I know that FLAC is a lossless codec. Usenet has a flac newsgroup and a lossless newsgroup. I see on Usenet a lot of "lossless" albums that are nowhere near the size of FLAC albums, though they are both considered lossless music, obviously.
For example, Metallica's Ride the Lightning album which is listed in a.b.sounds.lossless is 36.57 MB in size. If I view that same album on the tracker Exigo, the album is 363.49 MB - 10 times the size.
So my question is, are they both lossless and FLAC is just bloated, or is the lossless category on Usenet full of albums that are not considered lossless?