I like the design of the tipping system a lot. I would prefer for the platform to be decentralized and immutable, but if a decentralized platform were to use a reward system I'd go with publish0x's reward system. Nobody can downvote anyone else, so I like that. I don't believe in having downvotes and I find publish0x a nice experience where people can't harass you simply because they have money. Its more peaceful and pleasant than here.