1. When sending a notification, looks like, SPS only sends it to one User Agent (I can't find the "broadcast" logic), does that mean that UP has to do 1 PUT request to SPS per user agent ? 

1.a is a channel always associated to 1 user agent ? 

2. Does the content of the notification really only contains a version number ? (How do we pass other info, or is it just a trigger and the responsability of the UA to request to an app server the info?

Thanks

Seb