He won a t-shirt.
Kotaku have always sucked for competitions. I remember the shit they got for the Zelda competition because the guy that won hadn't followed the rules. Many folks were up in arms because the rules were really fiddly so they only got like 12 entrants. Then this guy just stuck on some cos-play (impressive, but not what was asked) then stood with a kotaku sign. And loads of folks were like "well if we knew that could of won we'd of entered, but the rules clearly state it's not what was asked". So yeah, double pissed cos someone who hadn't followed the rules had won, and that apparently the rules were pretty lax so they could of even entered.
Or the Burtal Legend "do your best Eddie Impression" thing. One guy got it down to a tee. Then they did the winners by random. So you could of just taken a photo of yourself and be in for a chance to win. Or the Uncharted 2 Legendary Edition, only like 10 copies made. Dude who won it at their exclusive Childs Play auction that you have to visit in person, meaning you'd have to live near Denver? Sold it on Ebay for few hundred dollars (which all the commenters had pointed out they'd raise shit loads more if they did it that way, but once again, that'd mean Shipping. Hosting it in Denver means Brain just has to drive to club.)
Or make a Starcraft/kotaku sandcastle. Meaning it's open to East n West coast only.
They try to make them a bit different, but they fail so badly at even simple competitions that they shouldn't really try. Pretty much folks should just enter. Don't pay attention to any clauses or such in the rules, the writers don't, and enter. then you're in for a chance, cos more than likely it'll be random, or the stupid rules will of forced only 3 people to join in so your chances are good even if you don't follow their made up rules.
btw regarding international shipping the only time they've stipulated why they couldn't was the Zelda one because Nintendo America had donated the prize and stipulated it was NA only. They've never brought this up other times.