If you stop playing you'll miss out on something or be left behind and unable to catch up.
"1. There's a battle pass every month with 9 exclusive songs. These songs aren't purchasable afterwards for multiple seasons. 2. They add new songs to the base game in large batches. If you don't keep up in either way, you fall behind on the leaderboards or the grind towards Unlimited Play. 3. Some promotional songs have never returned to the game. (Permanent missables) 4. Unlimited play is a limited time pass. The timer starts ticking down as soon as it's purchased."
"The game has a battle-pass component, and there are "E.G.O.s" and cosmetics exclusive to the battle-pass period, and are unobtainable afterward. Some of the rewards are only obtainable by paying for the battle-pass. And with any battle-pass, it requires that they player grind levels in order to obtain rewards."
"Because there’s constantly events (especially with beloved, popular pokémon and legendaries) it feels like taking a break will mean you’ll miss the one time a favorite will be available to recruit"
"marathons and events are limited and sometimes contain limited items and is sometimes almost impossible to complete without paying"
"It's so hard to have currencies that even just a day off is hard to compensate afterwards. There's dozens of rewards everyday. You also risk getting evicted from your guild if it's a competitive one."