This has certainly been an issue for some faculty. I think part of the issue is trust. Open education is more than just the content – once it all becomes just about the “OER” then we lose that sense of trust and the spirit of collegiality. We have reduced faculty work and possibly the teaching and learning itself into a transaction. This faculty member I am talking about is sharing her materials to help students and faculty and is not interested in enabling corporations to monetize, however indirectly, her work.
I don’t see an issue with non-commercial licenses, but I am interested in hearing why “CC-by” is such the gold standard 🙂