OSS is a mess in EU. In Germany, signing a FTE contract also entails implicitly that, if I produce something over the weekends, my employer has legal power to claim it as their IP. If I probably contribute something to some open-source project, my employer can also claim royalty of that too. While there are not much precedents of these happening, the legal rights remain. Also, non-compete is implicit too. Also, general brilliant people loved to hold onto their motes and not contribute back, a strange tendency I noticed on corps from senior engineer peers.
That being said, not everything is dark and there are plenty of open source work going in EU.
That being said, not everything is dark and there are plenty of open source work going in EU.