As long as they are honest, I really don't care whether they pay themselves or not, or whether the site is classified as non-profit or not. I would obviously have no problem paying a yearly/monthly/lifetime membership fee.
I was under the impression that they had to be non-profit due to copyright restrictions on reproduced (ie posted) works.
BTW, I've been here longer than you so what I say goes!!!
He'd be a fool not to.