I had USD by default and if I'm correct, I had played there a little with some free money lol but with $0.10 min bet. Am I messing up crashino with some another casino?
Probably you played different game because different game may have different min bet.
Simple example when I participated in BTCGOSU x Crashino promotion, I played few different games with $0.1 min bet.
For the current contest, the game is F777 fighter which has $0.2 min bet if your currency is USD.
USD is my default currency at crashino. There is no option to change the default currency. Therefore, minimum $0.10 bet isn't fair for everyone as the game has $0.20 min bet limit.
You are right, there is no options to change our default currency because the only step to choose the currency is when we register an account for the 1st time.