KDP's Newest Rule

I'm discussing a recent update from KDP (Kindle Direct Publishing).

KDP has introduced a new rule limiting the number of books users can submit for publishing, which I encountered while bulk uploading around 15 to 20 low content books.

I speculate whether this change aims to combat spammers or if it targets frequent publishers.

While it wasn't a major issue for me, it's an important update for anyone using KDP for self-publishing.