Stop Trying to Grow Your Online Community: Design for Belonging Instead

We've been taught that an online community is a numbers game. More members, more posts, more engagement — that's the path to success. But the evidence says otherwise: growth is often the enemy of belonging. In a survey of 1,944 Twitch viewers, researchers found that sense of virtual community actually decreased reliably as channels grew larger, and that belonging — not size — predicted whether viewers stayed (Twitch sense of virtual community survey). So here's our contrarian advice: stop trying to grow your community. Start designing for belonging.

The Problem with Growth

Imagine you're a moderator of a health support forum, say for people with Type 1 diabetes. You've been told to attract more members, hit a user milestone, get more posts per day. But consider what happens when you succeed. A study of user behavior across six platforms found that smaller platforms foster richer, more sustained interactions, while larger platforms drive broader but shorter participation (Scientific Reports 2025). In other words, growth brings a flood of lurkers and one-time posters, not a community.

This isn't just a theoretical concern. On Reddit, a taxonomy of bots found that bot activity exploded during the COVID-19 pandemic, peaking around that time before declining — a reminder that automated and low-quality participation can outpace genuine human interaction (arXiv bot taxonomy). When a community's growth is driven by bots or drive-by visitors, the people who actually come for support may feel lost in the noise.

Belonging Is the Real Metric

Instead of chasing size, we should be asking: do members feel they belong? In a study of 300 young people in anime/comics/games communities, belongingness positively correlated with participation intensity (r = 0.41) and self-esteem (r = 0.36) and negatively with loneliness (r = -0.39) (Frontiers in Psychology 2026). Belonging isn't just a warm feeling; it's what drives people to contribute, to return, and to help others.

But belonging is fragile. In a survey of 2,826 Reddit users across 281 subreddits, researchers identified three dimensions of sense of virtual community — Membership & Belonging, Cooperation & Shared Values, and Connection & Influence — and found that interaction patterns like reciprocal reply chains and prosocial language were associated with stronger communities (arXiv conversational structure). That means belonging is built through specific behaviors, not through having a large user base.

Designing for Belonging: A Concrete Scenario

Let's apply this to a realistic scenario. You're the moderator of a small Discord server for parents of autistic children. You have about 200 active members, but you're under pressure to grow to 1,000. You're tempted to run ads, promote the server on social media, and make it easier to join. But before you do, consider what the research says about Discord and third places.

Interviews with 25 active Discord users identified 21 design elements aligned with Oldenburg's 'third place' characteristics — casual, low-pressure spaces where people gather regularly (arXiv Discord). These included themed spaces for repeated interaction, user customization, and casual engagement. If you open the floodgates, you risk diluting the culture that makes your server feel like a third place. Instead, focus on deepening the experience for the members you have.

One powerful lever is to encourage reciprocal reply chains. In the Reddit study, such patterns were associated with stronger communities (arXiv conversational structure). So, when a parent posts a question about sleep issues, make sure someone replies — and that reply gets a response. This creates a cycle of engagement that builds belonging.

The Power of Small and Specific

There's a reason niche communities often feel more cohesive. In the Twitch study, sense of virtual community decreased as channels grew, and was stronger in channels that adopted community-specific symbols, like subscriber emotes, rather than globally recognized ones (Twitch survey). Symbols create a shared identity. You can do the same by encouraging members to use a specific phrase or emoji that only your community understands.

Also, don't underestimate the value of shared experiences. In a content analysis of the r/COVID19_support subreddit, created by researchers, 147 posts from 111 users were filled with themes like grief over lost college experiences and fears of graduating into a constrained job market (arXiv COVID-19 support). That kind of specific, shared context is what binds people together. If your community has a shared experience — parenting a child with autism, living with diabetes, surviving cancer — lean into it. Create spaces where that experience is the norm, not the exception.

Moderation Is Belonging's Guardian

You might think moderation is about keeping the peace, but it's really about protecting belonging. A randomized field experiment across 2,190 r/science discussions found that prominently posting community rules improved first-time commenters' compliance with norms by 8.4 percentage points and increased newcomer participation by about 70% (PNAS r/science). That's a huge effect. Rules don't scare people away; they make newcomers feel safe to participate.

But moderation is harder than it looks, especially in real-time settings. Through interviews with 25 Discord moderators, researchers found that voice-based communities introduce unfamiliar rule-breaking modes like disruptive noise and 'voice raiding,' and that acquiring evidence of rule-breaking is harder in real-time voice channels (arXiv Discord moderation). If you have voice channels, you need a plan for how to handle these challenges.

And remember, toxicity can drive people away. An analysis of 57 million comments on Wikipedia talk pages found that toxic comments consistently reduced editor activity, causing an estimated loss of 0.5-2 active days per user in the short term and significantly increasing the risk that editors leave in the long term (arXiv Wikipedia toxicity). So, don't tolerate toxic behavior — it's a direct threat to belonging.

The One Thing to Remember

When you're tempted to chase growth, remember this: belonging is the only metric that matters. A community of 100 people who feel a deep sense of belonging will outlast and outperform a community of 10,000 who just pass through. Design for belonging, not for size, and the growth will follow — but only if it's the right kind of growth.

Sources

• Twitch sense of virtual community survey - https://stacks.cdc.gov/view/cdc/130349/cdc_130349_DS1.pdf
• Scientific Reports (2025) - https://www.nature.com/articles/s41598-025-24545-z/tables/3
• Frontiers in Psychology (2026) - https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2026.1712286/xml
• arXiv conversational structure - https://arxiv.org/abs/2508.08596
• PNAS r/science - https://www.pnas.org/doi/10.1073/pnas.1813486116
• arXiv Wikipedia toxicity - https://arxiv.org/abs/2304.13568