AA sent me a link to their email “Appraiser,” which offers bonus miles for subscribing to various email lists. My address appraised for 2k miles after being offered signups for mailing lists I thought I was already on. If the miles clear, I won’t complain too loudly.
A discussion on FlyerTalk suggests that it’s accessible from a non-targeted link.
Hat Tip: Mooper on FlyerTalk.