I only want to pay by paypal. I found the payment systems confusing and I have not heard of them so worry about whether they are secure. If I had to pay a small admin fee to have it go through paypal I would because security is a concern and I trust paypal. I also think the game should have an option to play against people where no one has a different tank or options - then you can work out who is best rater than who has the most money or time to spend on the game.