How odd!? Goes straight thru here! ah well sods law.
Go to the Coinkite websiute and get yourself signed up guys. BlackCoin and Coinkite Cards being given away from Wednesday.
Viz
I can open it w/o issues...
The SSL certificate (CloudFlare) on the site referral page has a valid from date/timestamp of 08 June 2014 12:33:05, which here in the UK has yet to be reached (11:10am). It's most likely a localised issue with CloudFlare and not CoinKite themselves