I'm a little picky regarding music, but I've got over 950 songs in my library, of which over 60 are RBN, and probably more than half are RBN2. There's some good stuff in RBN, depending on your tastes. Like Bon Jovi/Hard Rock/Hair Metal? Free Spirit has a full album on RBN that has that vibe. Like Rock/Pop? Rose of Jerricho has several songs that have hints of a poppier Evanescence. And that's just 2 of my favorite bands to have RBN2 songs out.
Beyond that, there are plenty of $.99 songs on RBN, some pretty high quality stuff in fact.
If you're not willing to spend they money on an "unknown band", then that's fine, but to expect big time names week in and week out is asking for disappointment.