This is a major part of the Japanese "dating app" experience - they're known as "Sakura"; same as the offline version of people who are paid to, for example, play pachinko and win or stand in line excitedly to buy something. Most Japanese dating apps also don't have a free mode, and require you to use coins or some such token to message or even view profiles. They use Sakura to run down your coins, and then message you saying they want to meet up -- "Message me back! Let's make plans!". Rinse and repeat.