It fits a pattern. I was a hardware engineer at Valve during the early VR days, working mostly on Lighthouse and the internal dev headset. There were a few employees who insisted that the Valve VR group give away both hardware and software to Oculus with the hope that they would work together with Valve on VR. The tech was literally given away -- no contract, no license. After the facebook acquisition, these folks presumably received large financial incentives to join facebook, which they did. It was the most questionable thing I've seen in my whole career, and was partially caused by Valve's flat management structure and general lack of oversight. I left shortly after.