Wow I would absolutely hate this. I'm not doing 20% time to trend shit for YOU on GitHub so that YOU can feel like you're doing something as a manager; intruding on and micromanaging "free time" until it's anything but "free". I'm doing it to answer a burning question I have about something and do some exploration whether YOU think it's useful or not. And before you whinge and bitch that I'm there to serve the compan…
Do companies act like it's "free" time? My impression was that it's intended to be free time to focus on projects of your choosing, but still things that will (or may) benefit the company. This is a far cry from free time to work on personal endeavors which you seem to be describing.