Combine both rumors-- the purchase gets Apple the streaming rights they wanted, at a better price. Plus they get the current biggest brand in music and a pricey accessory to sell.
But is $3.2B less than what Apple would have paid for unfriendly streaming rights? Apple agreeing to a poor streaming rights contract is speculative too.
As for the hype and profits Beats makes through selling accessories, it's unsustainable. We are not talking about great sales due to a great product (think: Apple quality products), but rather great sales due it being a trendy, fashionably cool thing to own and be seen with. Problem is, trends/fashions change. These headphones could easily go out of style in 2-3 years.