This is just Adobe trying to rake more cash in. They are betting that companies are not going to switch from Adobe products to something else because a licence is twice as expensive. So far, it seems to have worked.
If Support location mattered, you would have hawaii being charged differently from the other 49 states for every bit of software. As it is I have at least 2 hours of cross over with US business hours. If I bought the US software and had to call in during US hours, THAT would be understandable. No local free call number... that is understandable. But NOT just not selling it.
In the modern environment, if your entire transaction is via the website and the support rep is in india, why does it matter if I am buying from the US or Australia through your US store?
Surely the only cost is currency exchange, which I have to cover anyway on my Credit Card.