While it's quite unclear from the website they have no affiliation with Jolla, the whois makes it quite clear they're not:

Registrant Name: yasin akgun
Registrant Company: yasin akgun
Registrant Address: 2 lomax rd
Registrant Address: hednesford
Registrant Address: hednesford
Registrant Address: WS12 4BU
Registrant Address: GB

What's more: the content is mostly irrelevant generic messages ripped from elsewhere. Useless. Nothing to see. http://www.jollausers.com/ does a better job.