That seems like pretty shoddy grammar and spelling for a company e-mail; I doubt that they'd send one out with "mmatter" and "Gamertag" used.
From a company e-mail: all you need is a Gamertag and the UPC code. It doesn't mmatter if you downloaded anything via Live. In fact you cannot anymore...
On top of that, if you didn't download anything, then they have no proof that you participated in the tournament. There's a reason why you can't get the downloads anymore, and it's because they're not going to let you rip them off.
How long before people begin bitching about not being able to get the games because they weren't part of the tournament?