This is brilliant. Instead of advertisers making sponsored posts that are ignored or trying to sneak an ad into a community, they can outright buy engagement. Utilize subliminal advertising, then advertisers buy their own "tips" (or whatever they end up being called) and they get back a portion of the money spent. There's been an uptick in those types of posts lately and reddit's just leaning into market trends. Not to mention that bots can earn real money by reposting top/all time content!