Terrance,
Yes, I know this. You will be surprised to know that some men in the USA who are looking for women from other countries cannot even meet this minimal requirement. One of my girlfriends 10 years ago married a man whose parents became his cosigners for K-1 visa because his own income was not enough for this. She wanted to leave Russia and she had no idea about poverty in America. She found out about it very fast after arriving to the USA...