[aerogear-dev] Questions about the Simple Push Server

I have 2 small questions about the simplePushServer which are not crystal clear for me : 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