Yes. This is possible now, the difference the JSONs would use is to allow for more granularity in the filtering. The catchall has limited usecase and doesn't scale. Plus, it doesn't allow for various things like paywalls. In the next HF (I think) they are talking about including subscriptions - pair that with the ability to show/hide content and it is possible to create monetized subscriber communities or even things like serve learning courses to users on a payment service.