And it's not a profitable move to kick out an establish va of title character that goes for ten years. And sp is not the only studio in japan. There're still toei and sunrise studio who make anime on regular basis.
I agree it's not profitable but it can happen.
Let me give you a recent example (not va). Jeremy Clarkson from Top Gear got his contract with BBC terminated because allegedly he punched a producer in the face. Clarkson was basically the face of Top Gear for 13 years along with Hammond and May, but Clarkson was the star. And the BBC still kicked him out and replaced him with an ex model even though Clarkson through Top Gear made BBC richer than ever.
And here we're talking about a show that brought in more viewers and more money than SP could ever dream of.
So yeah it can happen even if it's not profitable at all. Piss of the wrong people and you're out.
Edited by Nostradamus, 09 June 2015 - 12:20 AM.

Which I've told you - time and time again - is dangerous! There will never be consensus, son, among those you have helped to ascend. They will all differ in their views of what it means to be free. The peace you so desperately seek does not exist.
These men are united now by a common cause. But when this battle is finished they will fall to fighting amongst themselves about how best to ensure control. In time it will lead to war. You will see.