If a band wants to promote there new album, they might put the most popular song on there homepage with flash, or have a link to download it. I can see how this would encourage people to buy the album, because if they like the song they might want to buy the full album. But i have seen official sites where you can download every song they ever made, and videos for the most popular ones. I really don't get why they would do that, if anyone can download all the songs for free and legally, who would bother buying the album? It seems a bit useless to me, any thoughts anyone?