Paul Aiken, the Executive Director of the Authors Guild sent a letter to John Read of the DOJ addressing the DOJ's suit against Apple and five publishers. It's rather lengthy, but if you wade through it, as I've been doing from time to time (when my blood pressure drops to dangerously low levels and I need something to raise it), you'll find the following quote:
Now what's interesting about this is the list of publishers named. I'm not familiar with all of them, but PublishAmerica has been shown to be a vanity press with little to no editorial oversight. If you aren't familiar with the hoax manuscript some members of SFWA submitted, start reading here."Amazon’s vertical integration of on-demand printing eliminated the ability of iUniverse, PublishAmerica, XLibris and others to offer authors better royalties when selling through Amazon. CreateSpace appears to have thrived ever since."