Game launchers track user activity within the game. It's how developers gather "user research" about how people play their game. It's also telemetry about how your system is being used and is frankly invasive as possible without being illegal. And legality gets squidgy for data so nothing is off limits.

2K wanted that user data to sell to keep generating revenue from Civilization after the game and DLC were purchased. Typically a company has little incentive to linger on a game, they will publish, babysit the game for a few years with bug fixes, and quietly start developing the next project. 2K was farming data but for some reason didn't like what they got so they stopped. I'm not sure if this is caused by consumer backlash but the end result is a benefit for us game players.