Aw, the link is gone!
I suppose I can't be surprised e-texts aren't being offered for less... after all, it's supposed to be the convenience factor that's the draw, right?
Still, I'd also hope they'd put some work into the e-texts, providing searching, and hopefully highlighting, bookmarks, etc which users need. If they don't provide that, it's going to be hard to sell them.
Of course, a lot of that depends on the reader, too, so it's not completely their fault that things haven't taken off.