I don't know what they get paid, but how good is a free apartment if you're living there with a person you don't like and have to have sex with.
What I mean is, where is her life going to if all she does is fuck for a free apartment? At some point in time RLC will drop them from the program. And then what? Does she have anything or anyone to fall back at?
From that point of view I think that there is more between Paul and Leora that meets the eye. Unless they really get paid a shitload of money.