That's why in 5 years everyone will be playing with decentralized casinos. Decentralized casinos will geo-block but they will not steal for jurisdiction.
I was amazed to see DGbet recently. You are betting on chain which means bonus hunters can abuse their system since they can not confiscate any winning.
All the casinos allow play from Germany or other banned jurisdictions. They use mirror sites or VPN. Then the casinos confiscate your money if you win through KYC. Nitrowinner is no different than any other casino.
Before making a conclusive decision we can see what they have to say in this regards.