Having Xbox Game Pass Ultimate for a year +?

I’ve read in here that a number of people have Xbox Game Pass for more the a year. How is that possible? I signed up for the $1 trial when it first was announced and didn’t see anything dealing with this deal.

Curious to know how others are getting this deal.

The $1 deal converted existing Gold time to Game Pass Ultimate, for a max of 36 months.

So I bought 36 months of Gold, paid the £1 / $1 and got 36 months of Game Pass Ultimate.