I would like it if Sky had a prepay service, kind of like mobile phone Sims.
eg, I could buy a smartcard from sky, top it up and subscribe for a month if I like. It would be automated and online, so you'd rarely need to contact sky for provisioning/billing.
There are plenty of 3rd party receivers, so you are not tied to sky hardware .
I'd possibly look at getting back into sky if they offered like this.
I suppose they would have looked at this model though, maybe it does not stack up.