<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by ontheroad:
After you sign up for the 150 point offer to get e-mails from MasterCard, wait until you get your first e-mail then request to be removed.</font>
You don't even have to ask to be removed. Some of their offers aren't bad, so I've stayed on their list. I've still received the MyPoints offers and signed up each time to get the points. Must be at least 4 times by now and, I'm glad to say, I still only get one copy of the Mastercard email.