[roughbeast]

From what I can work out there is an implicit recognition that the hotspot within your Superhub has the potential to reduce your bandwidth when someone logs on to it. The speed upgrades are a trade off. Mind you our street has a residents-only parking scheme weekdays and Saturdays until 6:00 pm. Not many folk are going to be logging onto my superhub for any length of time!

How will it work in modem only mode? I don't know the Superhub architecture at all, but I am assuming that the trick is in the firmware upgrade which will be able to switch on WiFi just for the purposes of providing a hotspot, but will not switch on a private WiFi network if you don't want one.

I also note that if you don't want to participate in the network you can opt out. I doubt if this will affect your entitlement to the speed upgrade.