Because they want to go big. And why not. The two upgrades to the network should not be interlinked as The Telegraph suggests. Confusing or scaremongering consumers as that piece has done to you will only be a hindrance to a massive operation.
that is misleading if you believe your set tier will be eaten into by the hotspots. what will be eaten into is your local VM network, local capacity but that will be eaten by people who pay for VM services unless username and passwords are shared willy nilly!
The speed upgrade is purely to keep in line with demand. Faster speeds are the way forward. Streaming and all is extremely popular.