I'm saying that I said it first, no need to repeat me. There isn't any text there, how is that bad spelling/grammar?
It's done pseudorandomly, meaning that Collin's gonna have a "virtual raffle" on Twitter which takes all the tweets and shuffles them randomly, and then chooses one. He has to go through all the tweets first though to check for multiple tweets from the same account or vice versa. It has nothing to do with voting. That part is an encouragement for people to start voting if they haven't already.
I would like the [Potato] Prefix! It would look so cool and I would love to stand out in the crowd with people asking "How did you do that?" It would be a dream come true!