For most respects and purposes, Standard Broadcast is the creators on Nebula.
To put this to an extreme: If only the six owners were creators they could claim 100% goes to the creators without lying.
Then why shell them into a separate vehicle?
The purpose is to create two tiers of creators. That's fine. Some took a risk. Others didn't. But it's dishonest to then claim one is being transparent when the only reason for this structure, apart from incompetence or convenience, is obfuscation.