Whatever the market will bear. It's an entirely discretionary purchase... not like oil, gas, food, shelter, or clothing. So they logically increase the price until profits max out. In that sense, free-market pricing is unrelated to cost of production. No different than the costs of labor, works of art, sneakers, Smart Phones, Ageless Male Placebo... whatever the market will bear. And you just know that a USA based company will charge a stiff premium to foreigners for the privilege of enjoying the product. The American Astronomical Society is ... American!
So the only question becomes... is it worth it to you? Some (admittedly few) people would buy it at a thousand dollars a year! Tom
Giving americans the privilege to enjoy S&T makes no sense to me from a business perspective unless AAS is aiming to subsidise astronomical knowledge in their country of origin. In that case, being profitable wouldn't be a goal anymore. [it would not be in tune with a recent editorial either...]
Sending digital content outside abroad has the same cost as sending it to the neighbour's house. Then, why not sell more? It has only benefits!
AAS professional journals seem to have the same price for everybody. Adobe's photography subscription costs around the same here and in the EU, and they provide local support. If selling digital content abroad causes some kind of tax bureaucracy nightmare, then you simply don't sell at all. I don't think so, because the sale takes place in the US in USD. I don't think national tax bureaus are willing to investigate who is reading S&T in a tablet and haven't paid VAT for it.
Thus, the only reason I see is an agreement with overseas distributors or, as Tom points out, there's still enough people that can pay more for it. So, if more than half the current international subscribers are willing to pay double, then it's a wi$e movement. Probably their audience abroad is small and interested enough to allow that. Not that sure that would work with the US larger base of customers.