In my 30 years in Asia, I've seen it happen all too often. Statistically, east-west marriages rarely last more than two years. However, once past around 6 or 7 years, they normally will go the distance. But normally, once the eastern bride fleeces the western rube, they move on. Hopefully with a green card as well. but as long as it's at least long green it will be okay. Almost everybody I've ever met who set up a business in the brides country with the family running it has lost his shirt and everything else as well.
There are derelicts and flotsam/jetsum all over Asia, just looking for their next drink when they blodge enough for a pint off a hapless tourist.