If you still cannot, please try Chrome (rather than Brave or Opera, which we also semi-support) and turn off any ad/script blocker.
https://decentbet.zendesk.com/hc/en-us/articles/360029893911-playDECENT-gg-Ineligible-Jurisdictions
But if you are not on the list maybe their site were down for some maintenance because I too visited it and I can't access to their website too.
The entire site and its integration are currently built off of the VeChain blockchain. We do have a direct fiat method coming soon. That being said, we are currently listed on Oceanex.pro. We switched to a VeChain token to avoid the possibility of bloat on the chain slowing our service.
The token makes sure that you can also track its movements for this usecase, whereas bitcoin may not provide the full amount of information. Ethereum's wide support for smart contracts is why we used it in the past. Some dApps showed us that Ethereum is too prone to bloat.
The Comet Wallet is where the actual Token-Platform integration takes place. Keep in mind this is still a new platform, in the future, we may support other wallets - as well as adding site functionality into our main DBET wallet.