I myself like the platform very much, even if I can unfortunately only access it via VPN. Is there a reason why 1Win is blocked in Central Europe?
I just checkout their General Terms and Conditions and its seems for the legal issues they are not accepting clients from few countries and as I also noticed that there are some countries who are in the central Europe may be that's the reason for your block.

9.4. Due to legal reasons, we do not accept any Clients from the following countries:
9.4.1. Absolute restriction. Clients from the USA, Canada, UK, Spain, Latvia, Lithuania, Netherlands, France, Italy, Switzerland, Albania, Barbados, Pakistan, Syria, South Sudan, Cayman Islands, Haiti, Jamaica, North Korea, Malta, Panama and United Arab Emirates are not accepted.