Don't know if anyone has tried this or posted this method before,I have found a way to get cards 10x faster.When the idle master is idling a game simply click "Skip Current Game".You'll notice that you are getting cards mostly everytime when you skip a game.When it says Idling Complete,restart the app and repeat the process.But those games must be played/idled over 2 hours in order to get cards in this way.Hopefully this will help everyone.