I'd think it would be more likely: "what's the % of players with access to Western standard credit cards for the RMAH". Any country with an acceptable level of security for the "big four" is welcome at the table: nation states who lack this infrastructure, file under "who gives a shit".
One of the really interesting things about Activision/Blizzard is the limitations of their 'Pacific' servers: they only reach four countries in the region (Asia for players in South Korea and the regions of Taiwan, Hong Kong, and Macauhttp://us.battle.net/support/en/article/diablo-iii-global-pl...), which totally ignores Singapore, Australia and China.
Australia has large amounts to do with a national level of bastard like behaviour by a major corp.
China: I've had some interesting feed-back on the 'whys' of Chinese gaming being so hard to crack: specifically ~ there's two gov. departments fighting over the jurisdiction of judging "gaming content as acceptable", lack of resources to both, and (of course) total lack of understanding of the medium. As it can take 6+ months just to get official acceptance, and torrents / gold farmers / business minded Chinese cannot wait that long, the issue obviously comes down into the "cheaper to buy an account registered to >not China< and if/when it gets banned, move on". Suffice to say: most users use Steam etc & just lie about their location. Top tip: whoever cracks this, either via software, or political introduction & making the Party get a % cut with decent time-lines will make billions. HN really should think about this; imagine the Steam level profits... spread onto a couple of billion people.
Singapore: no idea why this isn't supported. Singapore is modern [business minded], has some seriously large bandwidth infrastructure [your google terms: bank dark pool hsbc] and is very 'pro-business'. I've no idea why Activision hasn't made the jump into just "doing Asian servers" and plumping for a Singapore based exchange, which could neatly divide their market into 3 manageable chunks.
That last one has puzzled me. I'm not getting paid to analyse it, however, and I suspect that once I started, I'd be either too interested or too disgusted to ignore the findings.
I don't think RMAH is so important. Asia has no RMAH at all and that doesn't discourage the sales. It's very very hard to make money from AH comparable to the cost of the game (60$) - a player will need to sell 400$ of goods to achieve that. Not realistic.
You can still sell game (boxes) for cash, make quick cash and forget. That's why they include Russia, for example.
Maybe it has something to do with the fact that making arabic translation is going to cost N times the regular translation due to to bidi issues and dialects.
Australia is told to be in US zone. I don't really get how they manage ping. So it isn't excluded.
http://diablo3-arena.com/new-diablo-iii-global-play/ Europe - For players in the European Union, Eastern Europe, Russia, Africa, and Middle Eastern countries such as Israel and the United Arab Emirates.
I see what they did here. Still I wonder why no Diablo in Arabic. All work and no play does make Jack a dull boy.