How these and other destiny streamers works is that first, you need to watch the current stream, then they promote the raffle and state to get in the raffle, you must be subscribed to them. Each subscriber they get pays $5 a month to support them. Half goes to twitch, they get the other half. So you pay to enter the raffle and these guys have a crazy amount of subs so most likely, you sub and pay $5 to never get picked. Also, twitch has a bad habit of charging you every month after that unless you cancel which is a pain