So, do you remember last Christmas event with all those fancy boxes? I made a box with Overcooked! 2 and wanted to give DLCs to the winner too. But it happened so that winner never bothered to thank me after receiving a key. Maybe they were disappointed that they got this game and not some AAAA+ title, I dunno. I hope they weren't too frustrated about it. No hard feelings from my side, but since they never bothered to thank me - I never bothered to contact them to give DLCs. Well, their lose is your gain - you can win those DLCs if you want it and still don't have it (please, check that you really don't have it before entering, since SG can't check for owned DLCs). Good luck!