SiriusXMInvestor, If you recall, on the thread "20 million subs" I stated that it is the ARPU that matters. Once again, here is the reason why, your figure does not hold water with a ARPU in the 10.13 range. It would have to be well below that for them to only have 7 to 8 million full paying subscribers.
P.S. The 22.3 % figure was all family plan that means that if someone has 3 subscriptions then the 2 are in the 22.3 %. Here is an example, In the case I just gave you, that person has 66.6% family plans and 33.3% original full (or somewhere close to it) subscription. That means that there would have to be about 7 other people that have only the full subscription and no family plans.