If I want a copy of an album, I can go to iTunes/Amazon/etc. and download the copy they offer, in a format I don't really want, encoded at 256kbps or similar. I have no idea what happened behind the scenes; which version of the album I'm downloading, what the source material was, how it was transferred from the source to their systems, so on and so forth.
Alternatively, I can go to a not-so-legitimate website, and be presented with 10+ different versions of the same album (originals, remastered editions, reissues, international releases, vinyl rips, etc.), each of which is typically available in all the popular formats (FLAC, MP3 320kbps, V0, V2, etc.)
I can plump for the FLAC, along with which I will often get high resolution scans of the source material, as well as a LOG file to verify the veracity of the copy. If I want to re-encode it, I'm free to do as I please.
Then to top it off, the legal services have the audacity to charge as much as a physical copy of the CD. I despair...