Does his uncle work at Blizzard? 
No but he regularly works with Blizzard for judging new maps and used to be invited to the balance meetings blizzard had with high level players to give suggestions (which they don’t do anymore unfortunately); so he’s respectable for a source of potential Blizzard news.
Fair enough, I respect the reasons. He’s probably one of the most popular streamers for sc2 at this point. Idk i never look at twitch ratings but it wouldn’t surprise me. Decent way to disseminate info or at least tease it.