These free-to-play games were popular when they first came out, but they are almost dead now.
By their very nature, free-to-play games are very popular, especially when they first come out. This is because anyone with the right gaming platform and an internet link can download the game for free and start having fun right away.
In the past few years, a lot more games have come out as free-to-play or switched to that model. This is because the model has been successful, and most of the money is made from microtransactions and battle passes. As time goes on and the competition gets even tougher, many once-popular free-to-play games have lost a lot of players and are almost dead.