while i havent sent out any invites yet, what i make out of how this works is that i nominate up to 10 contacts of mine for the card, and then amex connects with them. if it works for them, great, else its a no go. they are not authorised to spam my entire list
Yep you are correct contacts only those people whom you nominate for the same and the limit of 10 people nomination is strictly enforced, If they really had to spam ppl they would have just kept it unlimited or like the way it happens for other apps on FB.