Have had Ameriprise Platinum for one year (got it fee waived last year). $50k spend on the Plat account, and ~$170k across all AMEX accounts. Called for a retention offer. Got a 50k points immediately for keeping Ameriprise card. They also gave 10k AMEX points for the SPG card. SPG card has ~$110k spending on it. No offers for my other cards as the spend was less than $20k.