Let me ask everyone a question.
In all those contests by EVERY company (Pepsi, Fox, MGM, Snickers, etc) do they HONESTLY give a shit if you bought one of their products, saw their movie once, etc etc etc etc, and then never did so again?
No, of course not.
It's a CONTEST. If some lucky 1-post guy wins it, then oh well, that is why it is a CONTEST.
Sit around and bitch all you want. You have the exact same possibility of winning as they do (except for the asses who login under multiple names, but those cheaters can burn in hell).
Snickers doesn't care if I buy one Snickers, win 10K, and then never buy another Snickers. I had the same chance as any other person to buy that specific peice of candy and win the contest.
That's the cold hard truth. There are assholes in real life that will screw with systems for their own personal gain. Game hoarders come to mine.
Just take it with a grain of salt...