wow, incredible that it keeps selling and has that much!
the song is to old to been benefitting from the ascending of digital sales, yet too young to be able to have had a sort of revival, nostalgia boost with 2 generations loving it (like "don't stop believin" and some other classics).
It was used in some movie as soundtrack (Green Mile? if I'm not mistaken) or something, I never really listened to it as well, because I don't like rap.