It's from indiegala, hope you don't mind deleting this if it ends up being a duplicate or something. Had this happening quite often lately with keys from the "feudal challenge" game on their site. Still, so far most keys were ok and the ones that didn't, people were quite positive in deleting the giveaways.
If everything goes well, just don't forget to mark as received ;)
46,824 Comments - Last post 1 minute ago by Karp55
17 Comments - Last post 34 minutes ago by devotee
15,401 Comments - Last post 37 minutes ago by vlbastos
1,336 Comments - Last post 1 hour ago by devotee
33 Comments - Last post 1 hour ago by CheeseTuber
389 Comments - Last post 1 hour ago by vlbastos
1,411 Comments - Last post 3 hours ago by Agetime
55 Comments - Last post 13 minutes ago by DeltaBladeX
75 Comments - Last post 13 minutes ago by Delisper
53 Comments - Last post 18 minutes ago by Delisper
126 Comments - Last post 28 minutes ago by NattHS
19 Comments - Last post 1 hour ago by MoonQueen3
51 Comments - Last post 1 hour ago by noooba
35 Comments - Last post 1 hour ago by noooba