I like the framework.
Conceptual nit: why do you include inhibitions as a type of incentive? It seems to me more natural to group them with internal motivations than external incentives. (I understand that they sit in the same position in the argument as external incentives, but I guess I’m worried that lumping them together may somehow obscure things.)
It’s not obvious that open source leads to faster progress. Having high quality open source products reduces the incentives for private investment. I’m not sure in which regimes that will play out that it’s overall accelerationist, but I sort of guess that it will be decelerationist during an intense AI race (where the investments needed to push the frontier out are enormous and significantly profit-motivated).