It's exactly what the parent seems to be writing about. What they are saying is that the WSJ article is highly misrepresentative, that rather than there being a

It's exactly what the parent seems to be writing about. What they are saying is that the WSJ article is highly misrepresentative, that rather than there being a "data sharing" agreement, it would be more correct to say that Facebook hired them to program an app; and that app, installed on the device of the users, communicates directly with the Facebook servers, thus sharing no data with anyone.