Anecdotally, I also think that many people privilege “traditional print” and systems over other forms of information. This means that the schools that you described earlier would rather purchase materials from journals, or publishing houses…as opposed to open materials offered online.
I also think (and I know this sounds silly) but I think there is a belief that something might not be as valuable if it’s offered for free online. It’s a paradox that only Daniel Pink could understand…but I think that learners online might think more highly of open ed resources if we charged a small fee.
In summation, I think that there still is a portion of the population that prefer print, textbooks, journals, etc…and privilege traditional texts and models. I also think there is a mindset that online content, blogs, wikis, etc. are not as “good” because they’re free.
…I’ll soon start experimenting with that question about pay/free models soon to see if I’m dead wrong. :)