>>247411 (OP)
It's a neat idea. I think you would want to make sure you don't let the money reward affect visibility of posts, though. Continue to list things on the board in chronological order.
Secondly, you need a way to identify posters, at least on the server side. I don't think a cookie is a great way to do it, rather an account would be better. The accounts don't actually have to be visible on the userside, just to the server, so everyone remains anonymous. Then the account could have a payment method attached to it (optional if anon doesn't want to give that info out), either a paypal sort of thing or a crypto address. Let the site skim 1 or 2% off all payments, and donor is responsible for any fees involved. It could work.
I do worry about flooding the site with third worlders trying to make money, like others have mentioned. Not sure what the best way to do that is. You could just ban all Indian IPs or something, and only the ones who can figure out a VPN could get through. The backend account system also gives you some moderation tools, since you could ban accounts or ban them from getting money. But you'd have to think about a way to stop people from just making new accounts that balances users' preference for privacy. I wouldn't want to use a site that requires a phone number or collects hardware addresses/unique identifiers, for example.
I don't totally know what sort of posts wou