Originally Posted by
msp2msy
The fact that I'm already an auth. user on her Chase CO MC doesn't seem to have stopped me from receiving the offer.
It never would. These are independent. Card issuers only care about Primary cardholders as they are the ones have the ultimate responsibilities of paying the credit card bills.
It is not uncommon that one partner has to pay a huge card debt run up by the spousal authorized user, even they divorce.