Not true- just not this round. Use different ones for Singles and Active. You could have used the email addy for a different promo months ago, just not the current ones. I used the same email addys last night for DH and my dad as I did in a prior promotion and they worked fine- but if I tried those email addys for Active today they would not go through.
ALSO: You can only send one to one address. If you try to sign up say you and DH at the same address for any of the current promos it will give you an error.
all 10 of my invites are gone. however, i have a second set of 10 invites,so if you would like one, please pm me with your first name and email address. thanks