ServerLocation: Amsterdam, NL
ISP: Digitalocean Amsterdam
Support from Digitalocean Amsterdam :
https://www.digitalocean.com/company/contact/
Write to the support, they have IP logs from the owner.
https://twitter.com/hashieco talk to Twitter
EDIT: I'm working on more Information
PS: Why are you trusting a WebPage with such WHOIS information.
PPS:Tips are ever welcome 1Dhc9dyGaQcmvfNNLJXctizb3hjtCDVnEP
EDIT2
IN THE EVENT OF ANY PROBLEM WITH THE SERVICE, YOU AGREE THAT YOUR SOLE AND EXCLUSIVE REMEDY IS TO CEASE USING THE SERVICE. UNDER NO CIRCUMSTANCES SHALL WE BE LIABLE IN ANY WAY FOR YOUR USE OF THE SERVICES, EXCEPT AS REQUIRED BY APPLICABLE LAW. In some jurisidictions, the exclusions set forth above may not apply to you.
This "Exclusive Remedy" is not valid