My impression has always been that the Otherness and and the Ally are only in it for the real estate and don't give a rat's ass about the stuff living on it as long as the stuff living on it keeps said real estate from falling into the "wrong" hands (or whatever those appendages are). Then again both "entities" have been shown to be consistently rather stupid, though the Ally more so than the Otherness.
Ward Griffiths
"Men will never be free until the last king is strangled with the entrails of the last priest". -- Denis Diderot