Although I'm rank 4 currently I would assume that rank 5 is probably the worst rank to be as you are considered too low by people in main but the game says you're too high for beginners.
Well the developers are quite right about it not being Pay to Win but more or less pay to have fun. And while the game can be fun without Premium the game adds features that you really shouldn't need to pay for. (Like making maps or playing user made maps)
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