Yes but how are current bt vision customers going to react if they are thrown off sky sports in August purely because they live in areas not yet covered by infinity / multicast?
And they'll just leave.
But where any business in concerned, it's a numbers game. BTV users only number at 750,000, but there are now over 12m homes capable of accessing BT fibre. And upon last checking, 1.25m had already done so. And, in testing, the Sky Sports channels are already live on BT's fibre network. So they are coming.