Apple cares about only one thing: Maximizing total profits.
The fact that they pay substantially more for green power tells me that Apple feels the PR benefit outweighs the higher costs of using green power, and will result in a larger bottom line.
Where do people like you come from. I see this all time. They only thing company X cares about it maximizing profits blah blah blah.
They can use cheaper components in their hardware to maximize profits. They dont.
This IS the company that practically just hands you a new iPhone if you show up with a problem.
It never has and never will be about maximizing profits above all else and the way they do business is proof to this. Get off the hate business bandwagon and start dealing with the truth. They do care about product quality, they make choices that make for a better product but lower margins. Of course they try to balance that, but max profits doesn't trump other considerations.