Crap!
I knew there was a catch. No sooner do I discover how wonderful eMusic.com is and start pimping it out, I see they show up on BoingBoing:

This data sale appeared today in Direct Marketing News. It proposes to sell the personal information of those who subscribe to "an online digital music community...These consumers pay anywhere from $9.00 to $19.99 a month to gain access to a diverse catalog of over 500,000 music downloads in a variety of genres from top independent labels." The "datacard" says that the company has race, age, gender, religion, and income information on the subscribers. I'm wondering what music subscription site is selling their members' data!

So yeah, it seems like it's eMusic. From their Terms of Service:

Our Disclosure of Your Information
We may make your information available to others:
[a few bullets down:] Who are trusted third parties (e.g., promotional partners and advertisers) so that they can promote their products and services and those of their affiliates and partners based on your preferences and interests. You may "opt out" of such disclosure(s) to the extent they include your personally identifiable information by sending an email at any time to service@emusic.com indicating your intent to do so.

Needless to say, I am going to be doing this. No spam for me, thank you. Somewhat disheartening, and I'll be sure to point this out whenever I pimp the site, such as now, but unless they manage to screw up pretty badly, I think I'm going to stick with them for at least as long as my free trial lasts.  ¶ 4:45 p.m.