Related anecdote:
I was eating in a restaurant in chinatown in Boston.  The place was empty.
The only other customer was a white guy reading an asian-language
newspaper.  The guy asked the waiter for help translating a word.
Eventually his story came out.
He had married an asian woman through one of these introduction services.
after about a year of marriage she had charged him with assault and left
him, leaving no contact information.  He was hanging around in Chinatown,
asking random asians for help finding her.
I obviously don't know if he did assault her, but what struck me was that
the possibility of mutual exploitation is high.
Anecdote number two:
In college I had a job as a street vendor.  There was a guy I worked with
who was a lifer in the job.  He was a noticably messed up guy.  Among
other odd characteristics he fawned on women customers, doing stuff like
offering them flowers.
I asked him about it.  He said that he'd never had sex with a woman who
wasn't a prostitute, and his dream was to save up enough money to get a
mail order bride.
I was really moved.  The guy was a loon, but he wanted a companion as much
as anyone else and he was realistic about his chances.

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