I have the BT Wi-Fi app on my pay-as-you-go mobile and use it quite regularly. It's not only peoples hubs that are broadcasting as there is BT public Wi-Fi in various other places too - my local Tesco supermarket for example. A while ago I used it in a rented holiday cottage that had no Wi-Fi of its own, but could pick up BT Wi-Fi from a house nearby.
It wouldn't be the end of the world for me if they binned it but it does have its uses.