From day one Bitcasa has emphasized unlimited storage for all users. Looks like they couldn't pull it off despite all their boasting and promises. Either that or this is a money grab.
Apparently they just secured an $11m round of funding, but the investors might as well have burned their money. Their sole differentiator was the promise they couldn't keep: infinite storage. Now they have introduced "new and exciting" features (like a 10x price hike) all that is left is alpha-quality software that leaves you unsure if your back-ups are actually backed-up, rather than corrupted.
Bitcasa is on Death Watch. They are a joke.