On Pop Slots I make the most playing Emerald 7s or Rainbow 7s betting around $300,000 (you have to baby sit this game to pop balloons or you wont get any gold coins.) Right now I am at $10 mil on a game called Lucky Honeycomb Twin Fever. MyKonami games vary but there are a lot of really good ones. The best game on myVegas slots I have found for this is 7 Kingdoms (any bet you are comfortable with.) Just check in every once in a while to see if you have a bonus or need to click anything, (or adjust your bet if your chips are going too fast.) Now this may sound like a lot of playing but you can always just set it on auto spin and go do something else. I also play myVegas on facebook on my laptop which can be played simultaneously as myVegas on my iPad.
I play all four apps available for iOS, myVegas Slots, Blackjack, myKonami, and Pop Slots. I haven't spent any yet since I started playing and I am saving them up to use them later this year on a 2-3 night stay in Vegas. First let me say I haven't spent a single real dollar and I have over 200,000 gold coins.