I don't see how site scraping is a "data release".
In your first point you mention adjusting volume to restrict communication to your desired audience. OKCupid has privacy settings. Users adjusting their privacy settings would be analogous with adjusting volume in the restaurant. The people collecting data in this story created a fake account and used it to bypass the privacy settings. For your second point, it would be more like if you filled out a restaurant survey and saw your answers on an unrelated website like Reddit the next day.