I don't think that it was ever easy to get pity of sympathy sex from the internet. I have been using the Internet for over 22 and a half years and never met women online who were up for sex at all. Unless they were fakes. And you can spot the fakes a mile off.
How does pity sex correlate with social media? Why would a girl go for a guy for pity sex when she has 10 other options who want to give her a good time rather than a guy who may or may not cry during the deed?