Problem with the whole stuff is the game is constantly throwing sticks between the players legs.
you buy an character specific tower set which consists of 4 or 5 towers for 25000 Koins. In those towers they want you to have accumulated 50 uppercuts or 50 throws, so you have to grind this out first before you can tackle the character specific towers. yay!
you do a normal tower of time, it takes a long time and you get 10.000 koins and a few consumables for the playing, it isn´t even guaranteed that you get something cosmetic. yay!
i am sitting here with a Sonya that has in total 15 Skins, 4 intros, winning poses 2 fatalities and stuff and there is no guarantee at all to unlock something specific, i see the same intro, the same winning pose and the same fatality the whole time. the game is crippled essentially because you will never see those cosmetics in a reasonable amount of time.
so that is where these crystals come into play later. they want people to buy those crystals or play this game till your beard is long and grey.
people saying this is fine are not seeing the problem, this is a full price game with additional paid DLC characters and they treat you like playing a free mobile game. it is awful and it makes no fun. they should give out those cosmetics at a steady pace...
this is just awful, if the base game was 30 bucks and it was so stingy, well would suck but would be an explanation, for a full price game this is all the disgusting shit going on with games these days rolled into one nice package.