You can get decent cards from playing the game, but it definitely suffers from pay to win syndrome. It's impossible to complete the special events they have unless you pay up, and upgrading cards slows to a crawl. Apart from that, the gameplay is quite fun. And getting the pictures for the cards isn't too difficult to attain (Level 6 for all variations). Getting the event pictures past the first ones is very unlikely. It's much more easier to enjoy the game playing casually and not trying to get everything.