Right, they get paid for that, of course. They weren't asked to participate in it's inception or release and I guess Axl, Slash, and Duff didn't feel the time was right to release such a collection, but they most definitely profit from it.
I guess it would make more sense that they'd get a profit, but all I've heard is that none of them got any profit 'cause the record company just wanted to get some of their money back that Axl had spent.