I periodically change credit and debit cards just to clean out the people charging them

That was the end of AOL this last time I used them. Nice and easy without having to explain anything to anyone.
It's kind of hard to believe that AOL claims they are outraged by the way their customer service guy acted and he was now fired. Is there any reasonable reason to not have a cancel account button or form on AOL other than to try to convince people leaving to stay?