Looks interesting on my side, I pinged the primedice.co and .io ending websites, no incoming packets from the server. Only primedice.com works, maybe the attackers cloned the main platform and the server is open for certain countries, who knows. BTW, the main website is up and everything looks ok. My best suggestion is to check the certificate expiry date and "https" for the safety, checking isitdownrightnow helps sometimes too. Checking the "https" is necessary too in order to not be victim of the any possible attack because attackers can forward the traffic through different routes,AFAIK.
It might be cloned by the hacker/attacker and at the same time redirect can be mad by the admin. We can be confirmed only by the admin. Many a sites by a lots of related domain so that attacker cant buy those domain and try to scam other by pretending the real site. I think in this case happened the same thing which can be confirmed by the administration of the site only.