AMA and e-mail to members
It appears that when you become a member, you can opt for "not" receiving any "solicitation" e-mail traffic. That was the course I followed, thinking that I do not need any insurance or other spam e-mail cluttering my in-box. However, I did not realize that by opting out, I also cut any e-mail communication with AMA about subjects like the FAA registration or other non-commercial topics involving rc flying. If the AMA wishes to maintain contact by e-mail for pressing matters, it would probably be better to give you a choice and not force you to accept commercial spam if you wanted communication by e-mail.