I don't know if the answer is self-regulation. Even though it will work for a while, I don't know if it is sustainable in the long term.
Personally, I would like to see a maximum reward per post implemented, regardless of SP. @haejin's posts aren't of great quality and probably don't deserve hundreds of dollars, but may I point out that @ned's post above has already raked in $750 as well?
I am one of those accounts that just have been made to support haejin. I know him from youtube and wanted to actively support him because thats what he deserves imho. There are many like me which are simply grateful for all his work and that's how as an individual you can support him for his amazing work.
You'll never convince them barsic. It's like trying to talk to a flat earther.