thenammagazine
Super Freak
I agree that we shouldn't give out the code, but I doubt they would actually check in that way, partially because it would be a big job for them and partially because there are bound to be some people who bought the kit for someone else. There's nothing in the rules (as far as I know) that says you have to use the same account that purchased the kit, so you can't very well go back and retroactively disqualify people for that reason.
It wouldn't be a big job. It'd take less than 5 minutes and you only have to do it for the winner. Hell, you could even make them come up with their readiness kit code and it wouldn't take any time at all.