If you're in the Xbox Insider Alpha ring and you're enjoying the current Game Pass preview, there's a certain stop date now in place.
Insiders currently taking part are met with the following message in the Insider Hub app:
Thank you for participating in the Xbox Game Pass Alpha Preview. Your feedback has been invaluable and will make the service better for all gamers. We will be closing Preview on April 7 in order to make our final tweaks and updates. But don't worry, we're getting close to launch and Xbox Game Pass will be available for all gamers later this Spring.
That's still about three more weeks to enjoy the service right now, for free, ahead of launch. Microsoft has already said that Gold subscribers will get a chance to try it out first, but as yet we're still missing a firm launch date for the subscription service.
In any case, that hasn't stopped more games being added in recent days, and we've still got plenty of time to enjoy some new games on the house before Microsoft closes the doors.