This is standard business affairs for pretty much every big company. Apple, Google, Amazon, and many other fortune 500 companies, have all bought up dozens of businesses and their products and rebranded them as their own. Not sure why we're solely picking on Microsoft here...
Because Microsoft is the subject of this thread. We could pick on other corporation, MS isn't the only one, but whataboutism isn't an argument.
And MS practices are not standard business, they certainly understand the rules well, but have have been making illegal moves, it is a fallacy to word it as if illegal moves were part of the capitalism game: Monopolies are to be prevented, that's why anti trust laws were put in place, which MS was already caught breakig.
- Video games: Activision/Blizzard, ZeniMax, Double Fine Productions, Obsidian Entertainment, inXile Entertainment, Playground Games, Compulsion Games, Undead Labs, Ninja Theory, Mojang
- Developer ecosystems: npm, Dependabot, GitHub, Playfab, Deis, Xamarin, Havok, HockeyApp