I definitely disagree with the last statement. There’s nothing wrong with spending “real money” on a hobby. Maybe you have a different definition of “real money” from me (or I think OP)?
Anyway, I think in the long run, people won’t sustain a model of pay-to-play for AL. It’s not really worth it for anything over pocket change. If they aren’t making money on AL night, they should talk to their community of players, and whoever stores talk to at wotc. Wotc could easily allow the giving of exclusive loot cards if you buy certain things during AL night, or something. As long as it isn’t powerful stuff (more stuff like he cloak of billowing), I don’t think people will lose it over it.