Some of the true 'local' ppv events that your neighbours order are still unencrypted as its often not worthwhile for VM to encrypt material thats meant for an individual box. Due to delays in Emm streaming it wouldn't really be possible for a unique PPV tier to be created on a card in time for somebody who wishes to stream immediately.
Of course, with this kind of material your at the whim of the customer ordering the event. You will generally have no idea what, when or where these transmissions will occur as obviously they are not scheduled in any way !