According whois.com, their domain seems to have expired, and they just updated it today. Could be the reason they are offline. Can't tell.
Domain: bitzillions.com
Registrar: NameCheap, Inc.
Registered On: 2013-05-08
Expires On: 2022-05-08
Updated On: 2021-04-02
But the website is still offline.
Their account here has been offline since October 14, 2014. I will tag it, but I don't think it will be of any use since their thread has also been inactive for almost 4 years.
Sorry for the loss. Keep trying though. If there are any developments. Alert me.
We can still wait for 48 hours more and see if they will still get the domain up, they have one year for their domain, we can never be sure some scammers are still renewing their domain, even if they stop their project, we can only speculate, they will either get it up or sell the domain or parked it, 48 hours is enough time if they want to continue their existing project.