How to grow a LinkedIn network worth mining
Most people treat LinkedIn connections as a number. The people who get customers, partners and investors out of LinkedIn treat the network as a slow asset: built on purpose, kept warm by showing up, and then worked deliberately when there is something to ask for.
In short
- The edge of your network is where opportunities come from. LinkedIn's own large experiment found moderately weak ties were the most useful for finding new jobs.
- Aim for a few thousand relevant connections, built steadily. Thousands of people who can't place you is a bigger number and a smaller asset.
- Posting and commenting keep context current, so a message you send later doesn't arrive cold.
- Skip automation. LinkedIn's User Agreement prohibits it, and ignored or spam-marked invitations get accounts restricted.
- Once the network is too big to work from memory, rank it against what you need, then write to the few who matter.
Why a big network pays off
The best evidence on this comes from LinkedIn itself. Between 2015 and 2019, researchers ran randomised experiments on LinkedIn's People You May Know feature across about 20 million members, who formed about 2 billion new connections and took 600,000 new jobs over that period. The paper, published in Science in 2022, found that moderately weak ties were the most useful for landing a new job, with usefulness peaking at around ten mutual connections. Ties much closer than that helped less.
That study is about jobs rather than sales, and it would be overreaching to read a conversion rate into it. But the mechanism is the one that matters here. The people closest to you know what you know. The people at the edge of your network work in other companies, other markets and other conversations, which is exactly where your next customer, partner or investor is today.
Your close network is where your support comes from. The edge of your network is where your opportunities come from.
What you actually want is a large number of people who would recognise your name and have a reason to care about what you do. Thousands of connections who have never heard of you are a bigger number and a smaller asset.
How many connections is enough
LinkedIn caps first-degree connections at 30,000, and the number of people who can follow you is unlimited. Almost nobody needs to think about the ceiling. The practical target is a few thousand people concentrated in the markets you sell to, the companies you would like to work with, and the investors and partners who operate around them.
In a network of around 3,000 people built around your own field, we would expect somewhere between 3 and 8 percent to be plausible buyers or partners for a given offer at any one time. That is roughly 90 to 240 people: more than anyone can hold in their head, and more than enough to start with.
Growth should be slow. A few hundred relevant connections a year, kept warm, are worth more in three years' time than a burst of thousands this month that nobody remembers accepting.
Who to connect with
LinkedIn's own guidance is to connect with people you know personally and trust professionally. Read generously, that covers far more people than it first sounds like: anyone you have genuinely dealt with.
- People you have worked with, including clients, suppliers, contractors and colleagues from previous jobs. These are the strongest connections, and the ones most people never get round to adding.
- People you meet, at events, on calls, in communities and on podcasts. Send the request the same day, while the conversation is still fresh for both of you.
- People who engage with your posts. Someone who has commented twice has already started the relationship. Connecting finishes it.
- People in the roles you sell to, where you have a real reason to reach out: a shared community, a talk they gave, a problem they wrote about.
- Investors and partners in your space, once you have something specific to say to them rather than a general hello.
Add a note when the context isn't obvious
A short, specific note turns a stranger's request into a recognisable one. “We spoke after the logistics panel in Riga on Tuesday” gets accepted. A blank request from someone with no visible shared context mostly gets ignored, and on LinkedIn that matters for more than pride.
The shortcuts that backfire
LinkedIn may restrict an account that has sent many invitations in a short time, or whose invitations have often been ignored, left pending or marked as spam. A first restriction usually lifts within a few hours. An account restricted for too many outstanding invitations can wait up to a month before it is allowed to send another.
Automation is a firmer line. LinkedIn's User Agreement prohibits using bots or other unauthorised automated methods to add contacts, send messages, or create, like, comment on and share posts, and LinkedIn says it may restrict or suspend accounts it suspects of sending invitations with automation tools.
Even a connection-farming tool that never got you restricted would build the wrong asset: thousands of people who accepted a request from someone they cannot place. When you later write to them, you are a cold email with a profile photo.
Posting keeps the network warm
Connections fade in a particular way. People rarely forget whether they rated you. They forget what you are doing now. Posting is the cheapest way to keep that second part current for thousands of people at once, so that when you do write to someone, the context is already in their head.
What to post
- What you are working on and what you are learning, told as specific stories rather than announcements.
- Problems you see in your customers' world, described in their language. This is what makes the right people stop and reply.
- Opinions you can defend. Agreeable posts are forgotten. A clear position is what people remember you for.
- Other people's good work, with a sentence on why it matters. Generosity is visible, and it gets noticed.
How often
Once or twice a week, every week, beats a daily burst that stops after a month. We don't know of a published study that separates posting frequency from post quality, so treat any precise cadence you read, this one included, as someone's habit rather than a finding.
Comments count as much as posts. A thoughtful comment on a post by someone you would like to work with is often worth more than a post of your own, because it puts your name in front of the one person you chose, at a moment they are paying attention.
A weekly routine of about an hour
Networks are built by small actions repeated for years, not by campaigns. This is the routine we would suggest.
Anyone you spoke to this week, with a note that names where. It takes a minute each, and it is the most valuable connecting you will do.
One specific post about your work or your customers' problems. If you missed last week, don't apologise for it. Just post.
From people in the roles and companies you care about. Add something to the post rather than simply agreeing with it.
A job change, a funding round, a launch. A short personal message beats the one-click congratulations, and it restarts a conversation for free.
Someone you knew well and haven't spoken to in a year or more. One genuine message a week adds up to around fifty relationships brought back to life each year.
Turning the network into customers, partners and investors
At some point the network gets too big to work from memory. You know there are people in those thousands who fit what you are building, but you can't see them, and scrolling through your connections page won't tell you who matters for this particular offer.
That is the problem Rolomine is built for. You download your connections from LinkedIn as a file, upload it, and describe what you are looking for: customers for something you sell, partners who could refer or resell it, or investors for what you are building. Every connection is read against that brief, employers are identified by size and industry, and the list comes back ranked, with the strongest matches written up to explain why they fit, plus an opening message you can edit and send.
It is worth being clear about what it can and cannot see. LinkedIn's export contains names, job titles, employers and the date you connected. It does not contain bios, posts or messages. The ranking is therefore a judgement from role and company, the same judgement you would make by hand with a spreadsheet and a long weekend, applied to every row. Your own knowledge of the person still decides whether to send the message.
A tool can only rank the network you already have. The work in the sections above, connecting with people who know you and staying visible to them, is what makes the ranked list worth acting on. A well-kept network of 2,000 is a better list to rank than a neglected one of 20,000.
When you do write, the approach in our guide to reconnecting with dormant connections applies: say how you know them, acknowledge any gap in a single clause, say what has changed, and make one small, specific ask.
Common questions
How many LinkedIn connections should I have?
Enough that your network covers the markets, companies and people you want to work with, which for most founders and consultants means a few thousand over time. LinkedIn caps connections at 30,000 and followers are unlimited, so the ceiling is rarely the constraint. Relevance is.
Should I accept every connection request?
Accept the ones from people with a plausible reason to know you: in your industry, your market or your communities. Obvious automated sales requests and empty profiles add noise and nothing else. Being selective is what keeps a network useful.
Is it against LinkedIn's rules to connect with people I don't know?
LinkedIn recommends connecting with people you know personally and trust professionally, and it restricts accounts whose invitations are often ignored or marked as spam. What its User Agreement prohibits outright is using bots or other unauthorised automation to add contacts or send messages. A personal request to someone you have a genuine reason to contact is ordinary use.
Does posting on LinkedIn actually grow your network?
Posts reach people beyond your connections, and the people who engage with them are the most natural ones to connect with next. We don't have a published figure for how much it helps, and would be wary of anyone quoting one without saying where it came from.
What is the difference between connections and followers?
A connection is mutual, and you can have up to 30,000 of them. Following is one way: a follower sees your posts without you being connected, and there is no limit on followers. If you post regularly, followers are how your reach keeps growing past the connection ceiling.
Sources
- LinkedIn Help, network size limit The 30,000 first-degree connection cap, unlimited followers, and the recommendation to connect with people you know personally and trust professionally.
- LinkedIn Help, types of restrictions for sending invitations Restriction triggers, including invitations ignored, left pending or marked as spam, and the wait periods.
- LinkedIn User Agreement, section 8.2 Section 8.2.13 prohibits bots and unauthorised automated methods for adding contacts, messaging and engagement.
- Rajkumar et al., A causal test of the strength of weak ties, Science (2022) Randomised experiments across about 20 million LinkedIn members between 2015 and 2019.
- MIT News, the power of weak ties in gaining new employment Summary of the study, including the 2 billion new connections, 600,000 jobs and the peak at around ten mutual connections.
See who’s already in your network
Upload your LinkedIn connections export and every row gets read against what you sell. Free scan, no account, no card.
Scan my network, free