I finally uploaded a notebook/journal series that I've been sitting on for several years. Discovered that there is a limit to how many low-content books you can upload per day. Unsure if it's three or four in a 24 hour period (I uploaded one last night and three more today before I hit the limit).
While it's a little frustrating to be slowed down (I got 4 up, but I only have one more to add), I understand why Amazon has implemented this limitation. Too many people were just throwing up low-quality nonsense and hopping that something would stick. And Amazon doesn't want a catalog full of crap to offer to their customers.
Anyone else run into this limitation on their KDP account?