"Actually, it appears they are forbidding their employees from leading Bible Study in their homes when they are off the clock."
Well, perhaps not. Since their place of work is also their dorm room, in most cases, the question's not so clear, really. And RAs are typically not off the clock. If they're there, they're available. At least that's how it was when I was in the dorm. 3AM and a resident stumbles in drunk....the RA's on duty.
It's just not so simple, really. I suppose an RA could find some other job to pay for room and board if he/she didn't like the rules.