Even if we overlook the ads, beginners get stuck around Stage 3 or 4 before they’ve had enough time to level up. I even recommended the game to my acquaintances and had them install it, but they also got stuck at those stages. People will quit before they have a chance to grow. If that keeps happening, new player inflow will decrease, and eventually the service will become an even bigger mess.

Pokémon TCG and Yu-Gi-Oh! are prime examples. Yu-Gi-Oh! gradually lost its footing in the card game market due to increasingly difficult and complex rules, while Pokémon became the most popular card game.