1. It's plagiarism, not just copyright infringement. It is (or was, not sure it's still up) labeled "Baby Got Back (Glee version)", on the Swedish iTunes store, Coulton is not credited at all.

2. It's being sold for a profit...

3. ... by people who sue others for disproportionate sums, for sharing stuff for free.

Coulton actually published a karaoke version of the song, they just added a new, almost identical vocal track.