My friends are wasting their money on internet brides. Help.

A lot of my friends are really into these foreign women who are seeking men for marriage. I think this one’s an audacity and an act of desperation. With their age, they are too old to play around with these girls. I don’t know if they’re doing this to get married or to just get laid by a foreign woman. Should I just sit around and watch them waste their money on these women? Or shall I change my mindset? Are there real and successful marriages born out of online dating? Thanks!