BTW I agree with you that I often ignore promotions from BK8 somehow I think it's less interesting except for special promotions sent to random users
Sometimes the requirements are lower and easy to get it usually you have to be an active user or you are at VIP level.
As for the btc it's cool that they support segwit but I think this isn't what we called a blockchain right? But, it's still nice and I think many casinos didn't have a similar feature but they only support the traditional way to send and receive btc. This is why it's kinda slow sometimes especially if the network is congested but the only good part about them is they have lots of cryptos to choose from not only btc and stable coins/fiats.