Somehow Reddit has avoided being overrun by bot/affiliate spam and has become a better source of certain types of information. I don't know how. Perhaps some combination of the voting system (effectively outsourcing getting rid of junk) and algorithms. I'm building a photo booth and an example from today: if I search Google for the best budget PC with discrete graphics cards, everything other than the Reddit link is…
It costs very little (to hire a firm) to embed the exact same garbage ad link in a "real human" reddit comment.
Reddit is absolutely overrun with guerilla advertisement.