I've seen scattered reports over the last few years that seem to indicate that Amex has offered targeted MQM bonuses to upgrade from the Platinum to Reserve Delta cards. Amex confirmed that they have made upgrade offers between these two cards, but wouldn't say more about frequency or how broad they are targeted. Can anyone confirm they've received an upgrade bonus offer for going DL Plat to Reserve in the last few years? If so, what was the offer?