The site looks as if it has similar features like duelbits but not completely.
That's right OP should buy and use a copper membership and at least fix the post about full details or provide an image to be able to interest this forum user.
OP got 1 merit so they can show images in their post/threads so copper membership is not necessary.
Welcome to the forum. I just decided to check the promo code, firstly, after registration, a confirmation letter does not arrive by mail, although a notification has surfaced on the casino's website that it has been sent, secondly, when using the specified OP promo code, I receive the message "SUCCESS Success! You've received 0 coins", perhaps the promo code is no longer valid, but then there would be a message of a different kind.

It's most likely bugged. Maybe there are more parts of the website that are bugged. The website seems like an edited purchased script.