how many communities do you pay to be a part of?
Sorry, perhaps I was a bit glib - you have a kind of lottery system where your contribution is your “ticket” - that’s an unusual model (probably because it doesn’t work) - but you could give it a go and find out.
The challenge you have initially is getting the momentum going - not only does someone have to find your community, not only do they have to find the content engaging, not only must they be motivated to post, but they must also pay cold hard cash for the privilege - with maybe some chance of a return - but most won’t get any.
After they’ve failed to get a payout once - they will pay and post again?
You are essentially putting up a barrier to post, albeit with the promise of being part of some kind of lottery to win something.
I remain skeptical, but sure, give it a go!