I tried gossyp.me myself and I love it. I was successful with tinder.com too, but I find way more chemistry with people by talking to them - so I think to put it in a nutshell, it's just less of a waste of time to go down the gossyp route. I also have friends who are uncomfortable speaking to strangers so quickly, but for me it really is the way to go haha
Among many other interesting things, this book unpacks the game theory math around the balance between altruism and self-interest, and gets into the vital role that both play in the survival of our species. Amazon.com: Algorithms to Live By: The Computer Science of Human Decisions (Audible Audio Edition): Brian Christian, Tom Griffiths, Brian Christian, Brilliance Audio: Audible Audiobooks