Blizzard has it's 20 years of StarCraft event going on, where twitch drops can happen for watching games of StarCraft on twitch. After (presumably) 2 hours of watching, I earned my Bob Toss awards. This was expected.
The announcement pages also say "Watch any [SC] streams...a chance for a random StarCraft II announcer or co-op commander drop". So I kept watching hoping to get some more co-op commanders (or maybe some cool announcers or something).
Much later (this morning), I earned something else on twitch, but it looks like a generic SC20 logo. (The first thing everyone gets after watching 2 hours on Twitch) So, I'm not sure what I won. I logged in, but there wasn't an achievement or any other kind of toast. I have a couple of announcers and commanders already, so I'm not sure what's new. (I think they all came from other purchases e.g. Nova announcer from the Covert Ops pack? and commanders from various other Blizzard purchases.) How do I find out what I won?