Baen has been doing this for quite awhile. They even offer many free ebooks. If it was a massive fail to get rid of DRM they would have gone out of the business of ebooks.
https://www.baenebooks.com/t-drm.aspx
"Baen has shown that putting up electronic versions of books doesn't cost you sales. It gains you a larger audience for all of your books. As a result, [Baen have] done quite well."
http://en.wikipedia.org/wiki/Baen_Ebooks