Finally, about SU. IIRC they made some noises about being "open" in terms of their educational materials around the time they started, not sure to what extent they ever did this. The default license on their website was CC-BY from at least 2009 when I noted it at the end of http://gondwanaland.com/mlog/2009/08/01/singularityu/ til http://web.archive.org/web/20120118171102/http://singularityu.org/copyright-notice/ Now that is gone and their ToS, without me actually reading it  looks standard bad. I used to keep in touch with some of the people involved, but not sure if those people sill are (know for certain 1 isn't). Last I heard they were trying to shift from being a nonprofit to being a benefit for-profit, which probably doesn't mean much given poor nonprofit policies/actions, but without more info isn't a hopeful sign.