I recently heard a story (from my co-worker who is nepali too) that a guy wen to get married after talking over the phone and skype, and their family were ready too, it was kinda a love and arrange...
Once the guy reach Nepal, the girl refused saying he is fat just few days ago before the marraige.
Now the guy is back and had promised that he will never marry girl from Nepal ( will marry who is already here)..

So my point is exploitation happens both ways, Even seen girls getting married just to come to US and getting divorced as soon as they land.

I don't believe that guy goes back home spending 15k and more if getting married just becuase he wants to get married, spend few nights with wife and come back alone. and again start being single here. Thats a lot of money to find wife-like for many many nights.

But I do agree that girls family should be more careful when dealing with Guys from US. Many do that becuase they have family pressure and becuase their intentions are not good. But cannot generalize that. At the same time, I think girls family do have some form of selffishness (may it be finanacial or others) when they are unware with the situations of the guy, and as a whole how US life is and what the guys does back here in US.