MQD earnings during the 2024 calendar year count towards earning status for the 2025 Medallion status year (2/1/25 - 1/31/26) and thus you earned a 2025 Plat Choice Benefit (they won't also give you a 2024 Plat Choice Benefit -- only people who earned Plat during 2023 calendar year received those). The RUCs will be good for travel through the end of 2025 Medallion status year no matter when you choose them. You won't get another Plat Choice Benefit next year unless/until you re-earn Plat status and you will then get a 2026 Plat Choice Benefit.

The first year DL introduced Choice Benefits back in 2010, they did not year date them for the Medallion status year and it was possible to double-dip. After the first year, however, they began dating them with the status year and you only got 1 set of Plat or DM Choice Benefits each time you qualified for those status levels.