My understanding and expectation are that it’s up to various actors to build processes/apps that use what data you have and make available to them in ways that

My understanding and expectation are that it’s up to various actors to build processes/apps that use what data you have and make available to them in ways that are meaningful for their service. You then get the benefit of having YourData in services X, Y, and Z. In your example, your data has a Superwiki presence and a Wikipedia presence, which may not be identical, as its up to Superwiki and Wikipedia to present your data in their own meaningful way. Assuming each service has the capability to create and store data, that new data is still yours, and other actors could request access to it. I think this will result in various actors taking on the burden of keeping up with the Joneses—which, I think, would eventually coalesce into similar services establishing their own versions of shared data schemas with their own unique value-adds on top. Of course, these value-adds are likely still your data, and it should create somewhat of a feedback loop for similar, even competing, services. You likely would only be bothered to grant additional data access as the shape of that data changes.