The significant other penguin and myself compare our approaches most weeks. We get about the same amount. This isn't a sex based thing, this is an information and opportunism thing. Stick a male profile on Instagram and I can guarantee you'll get similar approaches from young women 'who just need someone to talk to'. That's an interesting way of experimenting because I think you've drawn a patriarchal conclusion on only half the information available - when the reverse occurs there's also the similar unfamiliarity with English, including lack of question marks and asking about partners fairly early on with a rapid drop off if you're not worth the time to invest. I suspect they're looking for single people to trick and then blackmail.