Did they give it to me because I fly paid F a lot? I don't want to call because they might revoke it! :P
Probably. If you buy paid F a lot, I can imagine AA would want to encourage you to do more of that! ^
I'm pretty sure it's harmless to call--though I bet the above is the answer you'll get. I doubt they'd take it away....again, if you fly paid F a lot, you're probably someone AA likes to keep happy.
(edited to fix my typo!)