But they were behind cloudflare, so at cloudflare they know who is wex. Why don't they tell, why do they help fraudsters hide?
Creating and administering a Cloudflare account only requires email address and password. Billing is possible through credit cards, Paypal, or bank transfer from shell company accounts that will never lead back to the real admins.
If the US government were interested in WEX.nz -- like they were interested in BTC-e -- Cloudflare could help locate their servers. But Cloudflare alone has no idea who they are.