Hello. 

All our links are the official websites of the casinos. Some casinos are operating on multiple domains. This is from various reasons (security, performance, etc.), but you should always be able to log in. But please be aware, if you received an email, where is the link on the casino usually with some urgent message, saying that you should change the password to the website. You could be a victim of a phishing attack. 

Did you contact the customer support and asked why you can't log in?

Currently all the pages are in trouble, could they say which ones are working the least?