An example of a crazy moment: https://www.youtube.com/watch?v=JrxXKK8oIyE
(He's not doing it full-time.)
AoE2 HD really got me back into PC gaming after a decade of only touching Wii/Wii U/mobile games. I'm not yet sure if it can drag me into watching Twitch, though.
Same with me about AoE2 HD, I hadn't played a PC game for years until I tried it. Now I'm hooked on both playing and spectating. The $30k Clan Masters tournament going on right now is insane.