Discussion in the other place led me to an sticking point with NC licenses
If there was a site which sold - at cost price - physical copies of
presently digital OER, say bound printed epubs or CDs / DVDs, and in
the sale of these items made no profit (so was non-profit /
provident?) would you consider that commercial?
Thinking is for people who don't have easy access to the internet this
might prove a useful intermediary