From a recent Recording Industry Association of America (RIAA) press release:
Watch for Compilations that are “Too Good to Be True": Many pirates make “dream compilation” CDs, comprised of songs by numerous artists on different record labels who would not likely appear on the same legitimate album together.
Don't you just love an organisation whose business model is so predicated on shafting consumers that they can keep a straight face while putting out a press release that effectively says, "We produce crap and try to cram it down your throat. If someone is selling the stuff you actually want then it's definitely not us."
Take me to your 'buy a dozen songs you don't want to get the one you do' overlords.