Yes, Sky is only legal in the UK but they have turned a blind eye. BBC is paid for by licence money and they would love to stop broadcasting here but then they would have to block all the independent 'commercial' channels which would get them big trouble. When Shirley raised the question about the BBC disappearing, I came across a report on an abandoned legal attempt to stop BBC being shown by the likes of Filmon. It would appear that a company being a legal person requires a single licence! Sky has an arrangement but Filmon? Do we care?
I get far more channels with my receivers. We are getting close to abandoning HotBird as it becomes more and more stuffed full of Arabic language channels. We now seem to use it for a couple of Italian progs a week for OH. The other receiver picks up all the usually 'Freeview' channels plus far more. The list can be substantially expanded and potentially give us around 280. It is possible to get many more, but Russian and Ukrainian or their ilk, perhaps not. Filmon has the Italian RAI channels and so... As for Filmon, we run it through a laptop that is attached to our large TV and actually the quality is not too bad.
Basically, we do not care who is legal or whatever as long as we are at this end and have what we want and everybody is happy.