Allow me to give you some advice.
create cold-wallets that are difficult to access (buried under the soil and miles away from where you live + with multi-signature and other hard procedures to unlock the funds).

tackle the problems of the game, because today you have created an account on primedice, tomorrow you could simply use a new site vanishing all the efforts and requests you have made to them.

it's too easy to bypass an IP address block.
unfortunately I believe that the only effective method is the one used by some casinos which clearly require KYC.
They allow you to set gambling limits that cannot be changed in a short time and block the creation of double accounts.
Unfortunately, we all know very well that the industry cannot regulate itself...you have to find the way to avoid these problems