Rushmere:
At the moment, it looks like they are focusing on retaining existing paying customers.
I doubt that they have enough of the new equipment to start making offers to potential new customers, and with the current supply constraints, I don't think they'll be able to offer anything to new customers for many months yet.
You are assuming that they are operating to an actual, coherent plan/strategy. My suspicion is that it's probably random - my experience of Sky's customer "support" is that it's comically bad. Worse even than Vodafone.