Under OGL 1.0a, material derivative of Open Content was automatically open content. The effort was in closing content. That is the point of Open Gaming: creating an ever expanding body of work that other creators can use and build upon. If Kobold put out their next Tome of Beasts under CC, they would have no obligation to open any of the content. if they did so under OGL 1,0a, they would have to specifically Close some content (and it is unclear whether they even can close derivative content like stat blocks).I'd say no more than the OGL did. There was no obligation under that to release anything as OGC. Same with this. If publishers want to release content they will. No change in that regard.