Taking the site down should be pretty easy consider the amount of scam accusations over the net and the ongoing lawsuit..
I have managed to take down 2 sites by just contacting it's hosting provider and its registrar.
Its SSL certificate is provided by COMODO, they also can be contacted.
I have alerted 1and1 hosting through admin and sales emails.
you alerted it for what? what does have the hosting with the service of one of its clients? pfff
Alerted them they are hosting a well known fraudulent site. Common courtesy. Of course they likely already know that, sure has been long enough
it's up to them if they want to keep hosting the site. Right now they still are.