After playing this game for a few months, it is clear to me that the pay to play has some serious balancing issues. Some currencies get way more than others. This game is technically free, but it's not fun free to play. You will spend days getting your army up and your resources up for an upgrade then someone way higher than you will come take it all away and nothing you can do. They have some protection measures but that takes gold which is not easy to get as ftp.