The guy replacing Bezos is someone called Jassy who has been running AWS, which didn't meet market expectations last quarter.
Being kicked upstairs and his departure letter bluntly stating he's not resigning has the hallmarks of a man who has been pushed.
Despite its overinflated share value Amazon's profits are very low for its revenue. I wouldn't pay well over 3,000 a share for their profit dividend, that's for sure. Amazon, like Tesla, is benefiting from a share market that chooses to excessively over value some companies to make money on the trading.
Maybe Bezos wants to run for President in 2024. Maybe the Board have decided they need to fix Amazon's profit margins. Maybe Bezos is sick and needs more control over his time.
Whatever the reason a change in CEO usually shakes things up, even if the guy has been a long term Amazon exec. I'm not sure how well KDP does financially. Probably not that well given Amazon's top level profit margins. And none of the other platforms have quit. Trad pub is alive and well. Amazon don't own or even control the book market.
Guess it's watch this space. It'd be nice if Amazon caught up with their competitors. They're really starting to fall behind.
Google and B&N offer 70% across the board and 30 day terms.
Google have immediate in-person support 24/7 where you can talk a skilled person online.
Google Ads have a account managers who talk to you on the phone (for any spend value as well).
Kobo have their own subscription service that isn't exclusive (it's based on time to read).