Good Question...
One big reason for AOL [and Mac too] is viruses - we don't get them. nobody writes them for us.
Another is...the mail account is so easy and dependable, and so easy to find and track all email traffic, even from years ago.
Another is...My friends are ALWAYS having trouble with their Outlook or outlook express. Seems like a pain in the arse configuring, viruses, etc.
Another is...I'm sure many people, like me, have a relative with the account, and we just each have a screen name. WHAT ARE YOU CRAZY I WOULD NEVER PAY FOR THIS MYSELF?! 😀