One year live gold reward via points?

They usually only stay for a couple of months at a time, keep hold of your reward points as it will probably appear again soon

Things come and go in the Rewards area all the time. It may come back. Hard to say though for sure.

Exactly. I've seen some suggest the year of Xbox Live was removed after Game Pass Ultimate became a thing, but I personally think it's just a coincidence. The year has come and gone before; who knows when it will come back since there is no set schedule
(that I'm aware of).

Not all rrwards are fixed some are only available for a certain time

Things come and go in the Rewards area all the time. It may come back. Hard to say though for sure.

So they have a set number of each each month. So for example they may have 500 1 month 500 3 month 500 12 months just has a example. Once they hit that limt then they are removed unitill the new month cycle starts again. They are then added back and the
cycle repeats. If your saving up your rewards then you just need to wait till the next cycle is in stock