Interesting in a technological sense, but what problem it solves isn’t obvious to me.
It lets me granularly authorize first party access what data I have in my pod, but there can’t be any technical guarantees with regards to illegitimate sharing or otherwise copying (many might at least cache, for instance) – nor about what is collected and shared outside this system.
I keep seeing data-hubs and identity-providers touting themselves as solutions to the web's privacy issues, but I don't see how they actually solve anything.
It seems like an attempted technical solution to a social problem to me.
The real problem with data based services (ads, Google search, etc) is really that a bunch of data is collected opaquely, unethically, and in some cases illegally. The whole system including data brokers and real time bidding is out of control.