Me too, but I can live with them in many cases.
Just farms cards? Okay, at least he puts the game into the "played" category in Steam stats, which is good for the publisher.
Sells it on the grey market? Then apart from the rather low standard of ethics, at least the key landed at someone who will play it. (Most likely.)
Trades it away? Okay, both of them got games they wanted, in a manner.

But putting the <censored> thing ON THE SAME DAY he got it from on the same site?
Why? It's just offending everyone.

Exactly. I really wanted this game since I'm trying to get all the Artifex Mundi games )': new name to the blacklist, I guess.

sigh
If you learnt from it, at least it didn't go to waste.
But seriously: enter for games you actually want. I know wining is a good thing, but winning something that is worthless to you defeats the entire purpose.

It will still be a better place at you than at him, to be blunt about it.
Plus, to add on some cruelty, you can re-report him for not delivering the game key in the allotted time. Yes, unnecessary cruelty, but sometimes one can be a little sadistic. (Even without being a chicken. :))

Hey, well good to hear you learned your lesson :)