I happen to know quite a bit about this deal. So let me teach you something. It is a promotion to help kids get the opportunity to see games and learn. Most of the people who join already have tickets.
They suggest to them that they get their tickets early because they are according to availablity. There will be some who come the week of the game to get tickets at a higher price but wont because BYU will be sold out. It is to help kids.
They are aware that there are idiots who criticize this promotion. But BYU does not care what those idiots say due to they want to help give kids this opportunity. If BYU had a 40 thousand seat stadium like RES they would not be able to provide this opportunity.