Sure seems like a case of price fixing, ala The Informant! but many industries get away with it.
We still go for family movies but the days in the late 90's-early 00's when I would see 80+ releases a year are long gone. By the time I pay for tix x4, I could just buy the b-ray, though I still like giving my kids (and myself) the theatrical experience if it's something they really want to see. (my 9-yr old son is much more into movies than my about to be 11-yr old daughter) I almost never buy food at the theater unless I have enough AMC points to get something free. The prices are outrageous. We just bring stuff in. Somehow, I think theater corporations will survive.
Not that it matters to me, I like Cuban and respect his business acumen, but he is co-owner of 2929 Entertainment and it's subsidiary 2929 Productions, which does produce it's own movies and content. (which Magnolia, who also falls under the 2929 Entertainment umbrella then distributes). Cuban also has a minority stake in Lion's Gate.
2929 Entertainment Film and Television Production
The company produces films and television programs through two production companies: 2929 Productions and HDNet Films. 2929 Productions, headed by Marc Butan, makes movies with budgets of $10 to $40 million. HDNet Films produces lower budget movies that are shot in high definition. Notable films include: