why not give a skin too in the firts paid tier?
they gave some for free?
just give something more than just matts. dont need to by a full skin give a weapon or something.
or a make some kind of sistem that allow the people that just paid the firts tier to get the skins of the super premium by playng the game. and change the super premium to give the skins in the moment that you buy. so you can chose to grind the game to get the skins or just buy the progress