You forget though, Cromartie, and Lucky Star sold terribly for keeping all the references, and japanese inside jokes around when they were localized. Lucky Star sales were so bad they overstocked, and never dubbed the OVA. Cromartie fell to the same. Despite well status among few, they both did bad in production sales. Durarara!! only sold well with keeping the references in because of Adultswim promoting it.
Bakemonogatari, I STRESS. Literally has few to little gags that would make much sense to the average viewer. I won't feed the rest to you, as you say you've heard it all before. It's the same as Fate/Zero and Kara no Kyoukai. AoA KNOWS who they're marketing this to, and KNOWS they'll buy it. (Kara No Kyoukai sales are proof enough of that) As long as they know that, and get the money, they don't care about you wanting it dubbed.
The fans that know this wouldn't worked dubbed, and having been waiting for years now for a legit release of Bakemono. That is who AoA is marketing this damn fine package to, and they know they'll eat it up. I know I will atleast.
Look at it this way, it's more than half off of the japanese release which as said, was over 300 bucks.