I noticed Pirates of the Black Cove is on GMG for $16.95, with coupon it comes to $13.56. The game appears on the list of retail keys that activate on Steam, but it also has a trade in value for GMG.
So I'm a little confused how it could activate on Steam but also trade in.
Edit: After finding a post on GMG forums about Pirates pushing patches through GMG, I'm assuming you don't activate this game on Steam.
Also, if anyone is planning on picking up Red Orchestra 2, and not interested in TF2 PM me. Maybe we can work something out.