YIz,

1) & 2) About the script, its the same as you said. We clone it. We first talk with an user here (https://bitcointalk.org/index.php?action=profile;u=357952 - you can contact him) to develop the script but since he price was a bit high we decide to clone an ICO site.

3) Of course we use a private domain register, you read our proposal? We could not do it any other way.

4) Really, you know how cloudflare works? There are like 30-50 sites (or more) that use the sames each nameservers.