I dont' know who Sal is, but MS will not be buying Pandora. You must have missed the announcement a few months back that Pandora was shopping itself (ie, begging for someone to buy the failing company), and nobody was interested. It could have something to do with other companies realizing that Pandora will neither increase their user base nor produce any profit for the acquirer.
Yeah, paid sub model doesn't work. Just look at the $1B plus per year in free cash flow that SIRI generates from a paid sub model.
Sorry, but the ad-based model hasn't produced a single penny of profit in over 15 years for Pandora, and won't produce profits in the future either.
Oh, and btw, glad to see you crawled out of your hole after you touted how great P was all the way down from $40 to the mid-teens, and then vanished. Now I see you're back, and probably claiming to be "in_at_8_bucks".