I downgraded Aspire to Hilton no fee last August 2022. I received a prorated refund last August and also received my weekend night and resort credit. My membership year restarts end of May.
Amex offered me to upgrade (without bonus) and I do have a use for the status next month. Question is will I still get a certificate and resort credit before for the May 2023 anniversary (even if I used/received it already)?