I used the Q121 promo. Only one I did use. Again retained 1K status.
I am enjoying the Q122 flights as getting upgraded, for the most part.
Have been able to use the majority of my PlusPoints for 2022 international travel. Waiting on the upgrades for my Summer 2022 European trips and then I am out of PlusPoints.
A Q122 promo would be nice to make 1K again, but I suspect the Q421 promo generated more $ for United than the Q121 did.