Bottom line: in advance of you leap in, make certain you comprehend how a assistance is capable to help a totally free presenting. If you offer 10,000 ebooks at 2,99, and make 20k. Even if you maximize downloads to 100,000 by giving it away absolutely free (really optimistic), even if ad providers will pay back half a cent per view (and that is pretty uncertain), a full web site ad will only net you $500.