Has Amazon Changed Algorithms?

Has Amazon Changed Algorithms or was I the Victim of a Glitch?

Brief rant before the weekend. I managed to score a BookBub Featured Deal for the first box set in my Blackthorne, Inc. series. These are (for me) very hard to come by, but BookBub’s reach makes it worthwhile. I dropped the price of the book from $6.99 to $0.99 (which will be in effect through July 27th).

Sales were very good. But one of the reasons for these featured deals is to gain visibility through higher rankings. In the past,...