Everyone just has to opt-in to it and remain opted in. That's a completely different community building problem, but it's still a problem. If you succeed at it you trade off the cost of "doing all the chores" with the cost of "keeping the community running" (unless you are graced with someone else in the community who is interested + able + better at it than you are) so you don't generally come out ahead (but it's worlds better for sustainability if you can build up something like that).