My biggest gripe with Amazon devices is their continuous 'adding another brick to their walled garden wall'
The main reason I go back to a business is they offer what I want, at a fair price (no necessarily the cheapest) and not because I am locked into their store. Ads before/after a book, OK (I paid for Ad free). Commercials While Reading
(This is what has gone wrong with US TV, Cable and even YouTube. MINUTES of commercials, multiple times a show)