Is there a reason this can't be purchased anywhere (DVD, Amazon, iTunes)

The DVD is out of print...you can't rent or watch it on iTunes or Amazon... It was on Netflix Instant watch at one point, but now it's gone.

What's the deal? They don't like making money? Seriously, all they have to do is put it on iTunes and Amazon Instant and people will rent/buy it. Are they preparing to re-release it in the future or on Blu-Ray or something? I know they've been focusing more on the live-action/CGI Chipmunk movies that pull in a lot more money than this one would, but still, it's pointless to ignore this film and its fans.