I understand why you would think that streamers were actively opting in before their streams were scanned, because you're probably a normal human being and you'

I understand why you would think that streamers were actively opting in before their streams were scanned, because you're probably a normal human being and you're probably having a normal human reaction like, "obviously streamers just sign up, how else would you even design a program like this? It's not complicated, you just put a form online." But that would be the sensible way to do it. In actuality the way they determine the participants is by doing object recognition on everyone's streams to try and figure out if a stream is already displaying Mountain Dew, and if it is then the bot sends spam messages to the streamers to ask them if they want to participate, and the only way streamers can opt out of all of that is "don't stream in the games category."