Theres alot of people out there who weren't around when these bands were making their music, like me, who are discovering it for the first time and don't have the luxury, or the inclination, to go out and buy their entire back catalogue. The benifits of Spotify and probably BTs new one, is that I can listen to music from artists I like that I haven't heard before because it's either too rare, or I'm cautious about actually buying because I don't know what it's like.
That's why you download through "alternate means," means that involve pirates and bays. That way, you get an "extended trial version."
While I'm not a fan of MPAA or RIAA and etc., there is a legitimate cost associated with shooting a film, and I think it's wrong to make a profit from selling unauthorized copies that the studio will never see a cent from. Same goes for recording a track (though I sometimes download an "extended trial version" of a song myself).
All I ask is a chance to prove that money can't make me happy.