A site that allowed those who feel they need this kind of negative feedback gamification to contribute their financial penalty to worthy causes would be a wort

A site that allowed those who feel they need this kind of negative feedback gamification to contribute their financial penalty to worthy causes would be a worthwhile thing to build. The thing to consider then is the reason why this whole idea is dubious; you end up replacing one dopamine hit (adult content) with another (either financial pain in the worst case or feeling good about at least donating in the best case). Personally I think there are many better ways to beat this particular self-abusive behavior than leaning harder on the idea that it deserves more self-abuse. Either way, making it a non-profit donation to something trying to address the real problem will be a huge step up from falling for the siren song of profit motivation.