Drop DRM to reduce customer complaints and increase sales

An article on ARS Technica reports that Deutsche Telekom's Musicload service claims that 75% of customer support calls end up being due to problems with DRM.

They also say that

Championing the "Comeback of MP3," Musicload said that artists choosing to drop DRM saw a 40 percent increase in sales since December, and that more artists and labels are showing interest.