Wow that's actually an impressively detailed breakdown that managed to address every single question I had. (I feel dumb for not checking "pricing" before, but seriously why wasn't that under "features"?)
I honestly think it is discoverable enough. I assume the reason why it is slightly complicated to find is business related. And that is understandable and fine.
With Amazon taking any opensource and hosting it on its own I would even go as far as saying use less permissive licence for future releases. Openproject came a long way.