Seems like Microsoft is helping others to get cross-platform play going, even if their software title(s) competes with MS IP.
http://www.businessinsider.com/roblox-xbox-one-cross-platform-play-microsoft-2017-10
- Roblox, a popular online game with 56 million players, will let Xbox One gamers play with their friends on smartphones and PCs, starting later this week.
- Microsoft helped Roblox build the feature — despite the fact that Roblox is a chief competitor to Microsoft's own Minecraft.
Roblox, a massively popular online game, is giving its Microsoft Xbox One fans an early Halloween treat: Starting later this week, Roblox gamers on the Xbox One will be able to play with their friends on PCs and smartphones.
Previously, Roblox users on the Xbox One could only play with each other. Meanwhile, Roblox has let smartphones, tablets, and PCs all play together in harmony for years now. With this update, the Xbox One joins the fun.
...
Which makes it a little funny that Microsoft actually helped Roblox to accomplish the feat of getting this cross-platform play running. According to Roblox CEO David Baszucki, Microsoft came in and helped the company smooth out the technical wrinkles involved in letting the Xbox One "talk" to Roblox players on other platforms.
"They've welcomed us as if we were a completely neutral partner," says Baszucki. He sees it as "a testament to Microsoft's vision under [CEO] Satya [Nadella] as being part of a more connected world."
...
In fact, Baszucki says that Microsoft helped bring Roblox to the Xbox One in the first place. Because all the games and characters on Roblox are generated and sold by players for real money, it presented a tricky challenge: the Xbox One wasn't really built for letting players swap and sell their own creations.
Baszucki says Microsoft worked with them to figure out a solution, growing from a small, curated selection of games and content into a full-fledged version of the core marketplace. Now Roblox's developers have a real opportunity to make money from Xbox gamers, while simultaneously giving those gamers more games to play for free.