Promo Results: BookBarbarian/BookTastik/BookScream
More Promo Site Results
I like to start these off with a caveat that different genres do better than others on different promo site. Also a site that is good for a free book might not work for a full priced or discounted-but-not-free book. Therefore, keep in mind all the different variables.
These numbers were for a free day promo on an Epic Fantasy Novel (with about 21 mostly 5 star reviews on Amazon, usually priced at $2.99).