There's certainly plenty of Chinese speakers outside of China (including Chinese nationals working or studying abroad). Obviously, it would be better to no have the Great Firewall closed. But people shouldn't discount the value of the huge expat/emigrant Chinese population.
True, there's a lot of value outside China, but more within. ;)
They made a Japanese version a while back. They opened offices in the country and everything. It's still taking a while for it to catch on. Sometimes it's just cultural. How much private employment information will the Chinese share?