[bodge5000]

I had a similar idea a few months ago, basically have a patreon/whatever monthly goal, if it doesn't get hit (enough to pay for the server costs), it doesnt get paid for and goes down. You could even have a "stretch goal" for dev time (basically what would be your profits), if it earns enough you spend time fixing bugs and adding features, if it just gets enough to keep it running, it just keeps running.

It seems like a nice and safe idea, but it does somewhat limit profitability I suppose, but thats an entirely different matter