these costs
They didn't hint anything about money, they said denied with "responsible" hint to possible legal fake news. If all they care about is money, they could charge more to cover it, freedom is a profitable business model. What close minded ISPs like this care about is refusing, on FUD / for control, that which may actually be quite legally possible for them to do.
reputation costs
So these ISPs get a bad reputation mark on the list of bad isp's, forums, lists, etc.
Explore the possible.