If you stop playing you'll miss out on something or be left behind and unable to catch up.
"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."