There are some discussion about this in their ANN thread as well as in Pmalek's thread about BTC min withdrawal and its fee of the existing casino in this forum. However, let me show you the proof about it from my bk8 account as shown below
Thank you Bitinity, that is more than enough proof for me so I removed bk8 gambling website from my grey list.
If I decide to test this website I will write more about my experience with it, same like for all other websites.