If you thought this was too good a deal to be true, I guess Microsoft agreed. A short excerpt:
"You can no longer claim a trial of Xbox Game Pass for £1/$1, just days ahead of Starfield, the year’s biggest Microsoft launch.
“The option has been removed from Microsoft’s Xbox Game Pass sign-up website (thanks, XGP). Now, you must simply pay the full amount for your first month.”
Long games like this were never what I spun up a Game Pass trial for anyways. It was always “finish as many 8-12hr games as I can in a month”.
That said, I still have plenty of Microsoft Rewards points racked up for the next time I decide to do this for free…