Unless I am missing something it seems a bit like trying to combine a semitruck and a bicycle to get green bulk cargo transportation. Sure both things individually have these advantages and it would be great to have all in one but implementing it is fundamentally nonviable.
"Mediators of Individual Data (MIDs) are a union-like organization championed by technologist Jaron Lanier as a framework for addressing the key issues around user-generated data like ownership, monetization, and reparations. An effective MID or data union could perform a number of critical functions on behalf of its members that are currently lacking in the digital economy."
There exists also a great Harvard Business Review article, but it is paywalled.
[1] https://blog.datadividendproject.com/this-week-in-data-101-w...
Edit: DataDividendProject.com (https://archive.is/iFhT0). Given that it is all blocked, it is not that interesting to me.