Let's wait for the team answer, like is it a branch site from bet365.
I don't think Nitrowinner have any possibility to be affiliate with bet365 officials. If they were, we would already see Nitrowinner popping up in front of us all the time when we were visiting other sites like block explorers.
Nah, there is no connection. If there was one google would spit something out, and it doesn't. I am still waiting for the explanation why OP thinks he can offer games to people residing in Germany. A normal license on some foreign island is not enough to offer sports bets, casino games or any other kind of gambling in Germany. That's why every site has Germany listed under banned regions.