One year gold subscription not showing in microsoft rewards.

This happened a while ago (2018) and then it came back but then disappeared again later (some time in 2019) and was back for like 6 months, and now, it is gone again. Is it just schedualed to disappear ever so often, or is this just a glitch? I know awhile
back it used to say 'Out of Stock' ever three months or something but hasn't done that for awhile so maybe you just remove it instead of saying out of stock? I don't know, but can someone help because 3 months is a total ripoff compared to 1 year. Please fix
this.

:)