A lot of speculation around this move by Amazon (removing FBA type businesses) has rattled around, and rattled some suppliers. But my sense of it is that Amazon has realized that a noticeable portion of their FBA business involves counterfeits and frauds. What is worse, the 'A' part of FBA makes Amazon a liable party to the fraud. I'm going to further guess that Amazon has been looking at ways to try to police people who submit counterfeit goods as 'legit' and get Amazon to sell them, and finding that this is a game of whack-a-mole that costs more than the margins they are getting on this business. The "easy" solution is to dump FBA (or at least strictly curtail it with new language/contract work that allows Amazon to recover costs from the bad actors).
It gives me hope that they recognize how crappy their offerings have become, especially in normally 'high margin' products like Apple accessories.