That's not news - they put that deal in place to discourage (or, at least, make $ from) Chivas supporters. STH's can buy single game tix.
I understand why they might want to discourage a large, pro-Chivas contingent - but that is going to happen anyway. I'm a former season ticket holder and check in daily for any news regarding the team. Why discourage me from purchasing tickets? I went to the Tijuana game and try to get to as many games as possible. But with kids, I can never seem to determine whether I can make a particular game until the week of. As such, I don't want to purchase tickets - particularly at a price point of $64 per seat for the upper deck.