For SPG personal card (About 10k last year)
Was offered 500 points + 1000 bonus points after spending $1000 in 60 days. Then I asked for something even better. After keeping me on hold she offered 3000 bonus points on top of the previous offer. I took it
For SPG Business card (About 6k last year)
The first person I talked to was very eager to cancel the card without offering anything. I hang up and call again. Now I reach the retention department who did not offer any credit but offered to downgrade to no annual fee simplycash card with 5% cashback in office supply and 3% in gas/travel. I took the downgrade.