In my situation, I have 1 x Supp on both my cards, Amex Edge & Amex Premium. Only have 1 Direct Debit on the Amex Premium.
Amex Edge had been opened for a year, Amex Premium opened since 2017, yes, I know, bad churner!
I use Amex Premium heavily that has a high credit limit, hardly use the Amex Edge with a low credit limit.
Annual Fee for the Edge had just posted, so I called up with the intention to cancel. I first asked a couple of questions about the annual fee and if I had to pay if I cancelled. Was happy with their answer and said "GREAT! Please cancel my Amex Edge card, I don't need it anymore"
After a minute or so, the computer come back with the 200k bonus points offer which I gladly accepted to keep the card open.