If its true that 50% of marriages end in divorce then I think its great that theres a forum relevant to this.
Yes, using someone for a green card is dreadful but then so is to be misled by a USC into marriage. I for one, would not return to the UK if my marriage ended in divorce (if I had the choice). Not because the UK is a s***hole, but because I gave up everything there to make my new life work.
Aside from the heartbreak of divorce, why should a foreign spouse be 'sent back' like damaged goods for a refund, because they turned out to be a person with opinions and feelings, not just a geisha in jeans.
To all the people going through divorce, then my heart goes out to you.