You buy a fancy car because it's what you like, you buy a big tv, big house, nice clothes, and movies, as well as pay for cable because it's what you enjoy! Everyone buys items or spends money on shit that entertains them. Well gamers enjoy watching gamers play their favorite game and sometimes spend hours watching so its only right they tip, although never necessary it helps support the streamer. Just like paying Netflix, going to the cinema, or watching tv, the money supports the entertainers! Get over it,