Piggy back off of an existing community that has already built trust -- for instance, build a forum for a local activity that often attracts 10+ years of participation and involves equipment. Your board will become the best place for users (who already trust one another) to swap used gear, discuss local venue closures, etc. Adopt moderation metrics that sustain your community (don't let bullies and spammers spoil everyone's experience.)
In 10 years, you can completely replace larger platforms as the community of choice.
And by then you have to worry about money to upkeep the platform. You sell off or sell out your users, and the cycle repeats. Even for the most well meaning people, it comes down to the fact that scaling such communication isn't free.
We hear all these stories of eccentric billionaires going all out on their hobbies. Why do we have no eccentric FOSS people who donate to keep such stuff FOSS?
So don't scale. There is a sweet spot where a few $2 classifieds (e.g, for motor vehicles) will sustain your operating costs, and the high-trust environment keeps moderation efforts/costs low, while the total target audience is too small for most bad actors to bother with.
Going back a bit further yet, I also miss local BBSs. Some were popular while many others were not. Almost all of them regardless of popularity were a labor of love: Very few BBS sysops ever recovered what was spent to start the thing up and keep it going and it was not, broadly speaking, an inexpensive hobby. It was a mosey-losing operation.
But since long-distance telephone calls were billed by the minute, the systems were geographically-bound by the financial disincentives of far-away users. This made for tight, local communities (often with small dozens of semi-active users, and sometimes even hundreds!) and pretty effectively kept the idea of global domination-style growth off of the table.
So, again: The constraints shaped it to be how it was.
What kinds of constraints might form a path towards to this kind of small success today, in 2026, while there are giants like Meta stomping around?
Very possible. I'm on Tildes and its invite only structure prevents the infamous Eternal September effect. It also means that it's nearing a decade and is very much not going to compete with other forums as a platform.
I'm perfectly fine with that. But that doesn't seem to be what people en masse want. They want to connect with all their friends and family, and discover new ones through specialized communities. On a scale of a billion people, that's hard to manage. And if no one principled fills that void, the unprincipled will.
>What kinds of constraints might form a path towards to this kind of small success today, in 2026, while there are giants like Meta stomping around?
Plenty of methods for that, centralized or decentralized. It's less a matter of "do we have the technology/ingenuity" and more "can it defeat the massive network effects?"
Having everyone pay in is one strategy. But we have 30 years of people used to free and open mass communication. How many will give that up for proper freedoms and protection from state actors?
Heck, it almost always seems like people give up freedoms whenever push comes to shove, no matter the industry or timeline.