The Kindle Direct Publishing (KDP) platform is a program offered by Amazon.com that allows authors and publishers to make their books available in the Kindle Store. The KDP platform has an agreement which outlines the prohibited content.
The agreement states that you can’t publish content such as pornography, offensive material, or plagiarized work. If you violate any of these terms, your account could be suspended or terminated.

Kindle Direct Publishing is a platform for authors to publish their books and make them available on the Kindle e-reader.
The publishing process can be complicated but it is worth it in the end. The best thing about KDP is that you don’t have to give up any royalties or rights to your work.

No, you do not need to have an Amazon Seller account for Kindle Direct Publishing.

KDP blocks books for a number of reasons, the most common being that they are not available in all countries. If you are not able to sell your book in all countries, then it will be blocked on KDP.
You can check if your book is still blocked by going to Dashboard > Bookshelf > Actions > View Status.

Yes, you can delete your KDP account. You will not be able to publish new books on Kindle Direct Publishing or sell any of your books in the Kindle Store if you delete your account.

I don’t know.

No, I don’t believe KDP is worth it 2021. Amazon is not the only place to sell your book and they are not the best place to sell your book. Amazon has a monopoly on eBooks and they do not provide any additional services that you cannot get elsewhere. You can still sell your books on Amazon, but it’s more beneficial to use other outlets like Smashwords or Lulu.

No, Amazon does not own your book. You still own your book and can publish it elsewhere.