Community needs hosting costs say $1k/y for all their needs. 1000 members pay $1 a year. But that is a lot of friction!
Probably a human problem. The activation energy from $0 to $0.01 online is huge compared to the monetary difference. Suddenly you need a credit card.
Whereas people would happily pay $3 instead of $1 for a drink because of convenience (convenience stores are an example!).
Maybe the solution is an in browser card-free micropayments system that you load up as a browser extension. Something like web3 without the cryptocurrency or blockchain! Chicken and egg problem though.