https://www.pcgamer.com/activision-blizzard-pays-employees-to-track-their-pregnancies/

Activision Blizzard pays employees $1 per day in gift cards if they track their reproductive health via an app called Ovia—and the publisher can see some of its employees' data in an anonymized, statistical format.

"Employers who pay the apps’ developer, Ovia Health, can offer their workers a special version of the apps that relays their health data—in a 'de-identified,' aggregated form—to an internal employer website accessible by human resources personnel," reads a Washington Post report on the practice, which highlights Activision Blizzard as a proponent of employee health tracking.