They estimate that they need 1,000,000 new subscribers to pay for it. I don't think that will be a problem really.
Considering 1 million new subscribers to cover a 100 million dollar contract it sounds like a loser but there are many more factors to think about as well like advertising, and the market behind the idea of pay radio.
sure, they will get many new signups when he first goes over. but after 3 months of hear "f-this, f-that", they won't pay the $12.95 anymore.