Hello Wayne @Mackiwg great to read you, quite a challenge you leave us here!! a sort of “Flipped Open Learning” commitment, thank you once again for your tireless open efforts, before any OER paradox.
Totally agree with you on how about overcoming paradoxes getting educators involved in open practices that lead to Learning to Share. As @opencontent points out, openness can lead for an educator to reuse an OER by adapting the resource to the specific context. That solves the Effectiveness side of the paradox (more context and impact), but what about the other side (the provider or who delivers) of the tradeoff (more reusable and scalable)? In other words, what is necessary and preferable to foster Learning to Share? Questions with K-12 context in mind.