I think I referred as "comparative advantage" to something different from what you mean. I was speaking to the advantages of the person hitting on someone: all else being equal you should focus on fora where your skills come to play. If that forum is large enough (like OkCupid), I think it makes sense to focus on that exclusively. In any situation where you meet potential dates specific skills matter and some people are better than others.
For example, I'm at a strong comparative disadvantage when hitting on people on the subway because I have a really goofy accent that people don't expect from my appearance and it lconfuses them. Someone who looks hot and has a great voice will do well on the subway without needing any context or background info on the person they are talking to.
There's a lot of data and research on what makes people successful at online dating, but I don't know anyone who actually tried to wholeheartedly apply this to themselves. I decided to be that person: I implemented lessons from data, economics, game theory and of course rationality in my profile and strategy and OkCupid. Shockingly, it worked! I got a lot of great dates, learned a ton and found the love of my life. I didn't expect dating to be my "rationalist win", but it happened.
Here's the first part of the story, I hope you'll find some useful tips and maybe a dollop of inspiration among all the silly jokes.
P.S.
Does anyone know who curates the "Latest on rationality blogs" toolbar? What are the requirements to be included?