I hadn't seen this until recently. It seems to be pushed by VCs and the tech megacorps, so if you work at a VC-backed startup it's likely in your contract or if

I hadn't seen this until recently. It seems to be pushed by VCs and the tech megacorps, so if you work at a VC-backed startup it's likely in your contract or if you work for one of the bigger tech companies. I believe IBM had this for a long time. If you're working for a company outside of "pure tech", it's much rarer