Beware of one of the old scams that's returned: Purchase a membership with an online site, and you automatically get enrolled with one (or more) sites that you receive no info about and, thus, can't cancel. For your *convenience*, you're automatically renewed a month later for $38. All mischievously hidden in the terms of agreement that you or no one else ever reads.
Point: You cancel your membership with the site you sign up for, but you don't cancel the sites you don't know about, until after they hit your credit card for the renewal amount that they refuse to refund.