That would be stupid, i have no idea why people keep bringing that up. Marvel was bought for 4B when the highest grossing film they had was the first Iron Man, Pixar 7.4B and Fox is looking to be upwards of 50B, according your point Fox will never be profitable. Taking into account studio acquisitions when calculating box-office is pointless. Compared to the rest of the acquisitions getting Lucasfilm for 4B is an absolute steal.
Spielberg getting a big cut makes sense because he owns the rights.