I don't usually get through the entire MP3 sampler, the ones they give away at Amazon.
I definitely appreciate the gesture, getting free music. But to have a track by particular artists that I don't really know doesn't excite me like maybe it would've once upon a time. I tend to want everything by everyone that I like and not just a lot of extraneous songs.
And I do generally like the songs I hear, except I can't afford to get a whole album by all of them. And I wouldn't have time to listen to them if I did.
So just to have a lot of random songs doesn't appeal to me that much.
I've been listening to the songs off a sampler tonight. Brushfire Records Fall 2009 sampler. There's some very good stuff, but it's the same problem (see above) with every sampler.