The lottery changed their system to ensure jackpots were harder to hit, which resulted in bigger prize pools, which resulted in more people playing, which resulted in bigger prize pools.
Look, I'm no fan of a lot of things that happen with casinos and poker rooms. I've stopped playing a lot of local tournaments (I have four rooms close by in the Tampa area) because every motherfucker is spreading unlimited rebuys for 9-11 levels, it's just ridiculous to me. I prefer freezeouts, so I'm voting with my wallet and not participating.
And while I love fixed-limit mixed-games, there's only a little of that available in my area, and usually on a schedule that doesn't fit in with my work schedule.
I can't be mad NL Hold Em, there's plenty of money to be made playing it, and I enjoy it as well. And the rooms are going to spread what people want to play. If enough people come together and want a game of 7-card stud, it'll get spread.
I also can't stand the amount of additional "rake" that comes out of bad beat prize pools (oh, we have to take an administrative fee out of this for sitting on hundreds of thousands of your dollars for months), or how some rooms will award tickets into other tournaments for high hands, first five flushes, etc. during their weekly tournies (and in the process take 25% of the frigging prize pool out in doing so!)
But guess what? Enough idiots put up with it, so the rooms keep doing it. Vote with your wallets and if enough people do that, it forces them to change.