It is inaccessible for you does not mean that it is inaccessible for others, you can always check using an online service like downforeveryoneorjustme to make sure the site is down on your side only or for everyone.
The down for you may due to countries restriction from the casino's terms or it can be from your ISP that blocks you to access the site.
I checked the site now after reading your post (it is my 3rd visit) and it is still working fine without any issues.
This is the first time that I have heard of this website, and it's a helpful one to be honest and I think that I will be bookmarking that website because it's notorious in my country for the websites to go down due to really slow and archaic Internet framework so I have some reference that it's not us that has the problem but the website itself.