It's exactly what the Sprint rep was referring to. More evidence that chat reps may know nothing more than what they can find from Googling?
The Sky Q Hub isn’t just a regular router though, instead it’s an integral part of the Sky Q system. That means the other components, your Sky Q set-top box and any Sky Q Mini boxes act as wireless repeaters, expanding the range of your Wi-Fi network. It’s a brilliant idea, as such systems have been a bit finickity in the past and this simply works - once Sky’s engineers have plugged it all in and got it up-and-running of course.