We just did!
For using the WoR 1.0 with your own app(s) you can imagine it (simplified) as a large map of identity/rating pairs. So the uploaders/posters of content that is discovered can be looked up and a threshold rating value can be used to decide whether content will be displayed or not. It is more about spam filtering rather than content personalization, the rating is not an indicator for user appreciation.
It is still vital for personalization because you cannot just trust that metadata of content uploaded by others is correct. One attack vector for JAMS in this regard could be rickrolling music feeds through false metadata. 