What token are you talking about, does the casino have their own native cryptocurrency token?
As the other users have already explained above, the token is a play-money which can be exchanged for the available crypto on Bitvest.
I forget about the rate of this token but I think it is like 1 token = 1 satoshi.
Nope, 25k tokens are equivalent to 417 satoshi at this moment. Maximum 1 million tokens can be exchanged in a single transaction which gives additional 500% in crypto. However, the exchange rate was different in the past.