AFAIK it doesn't have ads, you pay for in-game currency to spend on cards which can also be won in-game. It's entirely possible to play the game without spendi

AFAIK it doesn't have ads, you pay for in-game currency to spend on cards which can also be won in-game. It's entirely possible to play the game without spending any money, although grinding may or may not be fun. I played a bit when it launched and stopped after a week or two.