If you're going to get me to 'sign up' via facebook or twitter, at least please make it clear that i'm only signing up for a mailing list, and that there is not

If you're going to get me to 'sign up' via facebook or twitter, at least please make it clear that i'm only signing up for a mailing list, and that there is not yet any product to use. Thanks! EDIT: received a welcome email after about 20 minutes, so I may have spoken too soon.