Its not completely uncommon. Sometimes its very specific the tooling you use. In this case the fact that this knowledge is going to benefit one particular com

Its not completely uncommon. Sometimes its very specific the tooling you use. In this case the fact that this knowledge is going to benefit one particular company might be seen as problematic. You aren't going to use these skills in Linux or Windows development. A lot of programming classes utilized specific tech (The Extension school at the University I work at teaches classes on React and Vue and Laravel, R, Python....) These are cross-platform tools and generally free. I think it can be useful to have this knowledge out there. The parts of it that are good might end up in Open Source projects or give people ideas of different ways of doing things.