Heh I added Micron and the other 2 last night and looking through my account, I found 3 other bundles with a key each that I'd not redeemed!
Maybe you should check your? O_o
Maybe the new Steam keys that have been added?
like DLC Quest and others?
Yeah, DLC quest was one that was Green Light at the time but the others were Desura (there may have been 4 including DLC Quest - I wasn't counting that one because I'd unlocked it on one service at least)
I think I just bought the bundles, activated the games that were unlocked at the time and forgot to check back to see what else got added - probably saw a shiny thing in the meantime...