(This stemmed from another topic I just read)
Here's why: Greatest Hits usually means you've ran out of ideas and you admit that your band/group/artist is dying. I'm not saying ALWAYS, but most of the times. The most potent example I can think of now is Creed.
They mainly have 3 albums: Weathered, My Own Prison, and Human Clay(all which I own). They have a bunch of singles and such along with Maximum Creed...a useless CD that you can get for free off their website(or use to). They release a greatest hits album after 3 titles. What happened to them? They pretty much faded.
Though some groups can get away with Greatest Hits CDs like Green Day and Outkast, most groups die after these. Another example is Bone Thugs n Harmony, one of my favorite groups. They released a GH album in 2003, three of them I think, and they pretty much faded after that...not even an album after it.
Greatest Hits albums are just compilations from previous albums that were airwave hits, but they charge you the full album price for re-copied material. Kylie Minogue releases greatest hits CDs(like, 6 of them) and at least throws in some new remixes of popular songs...but for the most part these GH albums are not worth the new album price. Really. I mean sometimes groups rename GHs albums so they sound like new, for example "Big Boi & Dre Presents....Outkast".
Generally a greatest hits CD should come out after 5-6 albums...but anything earlier(especially like Creed) basically tests us you're throwing in the towel because your new ideas suck and you ran out of material. I know the whole point of GHs CDs is to make money by attracting casual fans, but I usually respect an artist less if they do so early in their careers. Lenny Kravitz put out his GHs CD way too early, when much of his material really stinks. Same goes for Sheryl Crow, whose "The Very Best of Sheryl Crow" is just a laugher.
I'm not saying GHs CDs shouldn't exist, but how much effort actually goes into these CDs? Just compile songs together and make some new art for the album and that's it. For one thing, GHs in music should follow those in the gaming industry...reduce the price to maybe $8 or less.