It has a system like that of OkCupid albeit more advanced where a user is given questionnaires to determine their compatibility to another user. Tinder is location-based, meaning you'll match up only with people nearby — in some cases, in the same building bar, restaurant, etc. The site has garnered over 20 million users and the number continues to grow. The ads with same-sex couples are an obvious giveaway, but OkCupid has snuck in other little features to weed out more conservative-minded people.
Hey, maybe they're just putting all of their focus on the matchmaking.