I have went ahead and checked through all my past accounts, and every single one was closed on my OWN request. The normal process for closing an account is for you to e-mail or call amazon's CS, have them sent you a confirmation e-mail that you want to close your account (with a link in the email), click it and then confirm it yourself.
But in my case, the account specialist seems to have thought that one of them was closed forcibly by Amazon themselves, which is not the case for me. I've only had 2 accounts previously, but both were closed by myself and not amazon. I don't understand where this "abuse of policy" is coming from.