When a high number of users are on the app at the same time, Tinder sends you a notification to warn you and push you to take part into the "Swipe Surge". They also notify users about those who are active on the app. Tinder claims that during this period, user engagement can go 15x and you have 2.5x more chance to match someone. Apart from bringing excitement to the game, they punctually relieve the user from the pain of the asynchronous matching process, as you can match and engage a discussion at the same time. The app even sends you a notification at the end of the surge to recall that you missed the load of opportunities that came along 😏