Originally Posted by DMC_OWNER
Umm, because the only two songs radio stations played from Recovery were "Not Afraid" and "Love the Way you Lie" making every other song on that Album less mainstream than those two.
That's because both of those songs are released as singles from the album. So, all
of the other songs on the album get less mainstream exposure
than those two singles do, but they aren't any more "underground" than those singles.