Never thought to just post the AMEX referral link publicly to get the referral bonus. Great idea. ^ Wish I could have thought of it as if I do it now, I will be a copy cat
I wasn't really posting for the referral (If you notice for the Amex Aeroplan Platinum I posted the Aeroplan.ca link and for the SPG i posted a generic link that has the first year free) Agreed for the cards above I did post my referral link as the people that signup do get MORE or at least the same as "off the street".
Since the referral does not include our emails anymore (it used to) it's safe to post publicly. And I just found out that the same link will work for multiple people. I will add a disclaimer to my original post.