One of the more interesting titles that came out for the Xbox One was Project Spark. This title let many folks create games and share them with others. But alas, all good things must come to an end. Today, you won't be able to purchase it and the servers will be shut down after 8/12/2016.
Most of the team members have already moved onto other projects and keeping the game up to date with bug fixes and the like just wasn't going to work without the man power. So, anyone that purchased the Project Spark after October 5th, 2015 will get a credit as well as those that redeemed the starter kit.
It had a good run with a great deal of creative content coming from the gaming community. At least those that developed the game have moved on and there weren't any layoffs.