I think more research would need to be done to ascertain whether that approach was drawing in more users.
I think in the U.K. the approach seems to have been to develop a business case and the higher economic impact scores that you've seen in the open data barometer compared to the example of social impact scores perhaps indicate that the approach is leading to impacting the economic sector.
I would also just point out that in the U.K. the approach has been towards people developing business cases for opening up government data, so it's very economically driven.
Although there is a data unlocking service, civil society accessors have found it quite difficult to access the data sets they need through that service, so the triaging that is going on seems to be directed towards certain ends at the minute.