Tinder has around 40m profiles. PoF has around 90m. Tinder interaction is much more superficial than PoF, of course, due to the nature of each platform and the amount of user information captured by each. Tinder has far more "swipes" (how they measure activity) than PoF has page views (how all websites measure activity) - to the point that Tinder has about a billion swipes per day and PoF has around 2 billion page views per month - also by their nature different measurements.