Got it. It's in New York. It was fairly easy to find because the ResetEra terms of service have a governing law provision specifying New York law.
Selected Entity Name: RESETERA, LLC
Selected Entity Status Information
Current Entity Name: RESETERA, LLC
DOS ID #: 5221624
Initial DOS Filing Date: OCTOBER 23, 2017
County: NEW YORK
Jurisdiction: NEW YORK
Entity Type: DOMESTIC LIMITED LIABILITY COMPANY
Current Entity Status: ACTIVE
Selected Entity Address Information
DOS Process (Address to which DOS will mail process if accepted on behalf of the entity)
ISAMU FUKUI
77 E 110TH STREET
7C
NEW YORK, NEW YORK, 10029
Registered Agent
NONE
This Isamu Fukui guy has been mentioned before I believe.
He appears to be something of a prodigy, and wrote a published novel at the age of 15, receiving a lot of publicity for it. He's currently a student at NYU. All this is right in any Google search and unlikely to go away so I won't bother including a big data dump.
His first novel Truancy was published by Tor Teen but he is currently listed with Macmillan. That's about the only connection I can find with any Internet drama, and it's a really loose connection (Tor Books is the primary beneficiary of the Hugos that set off the whole Sad Puppies fiasco as they accused the Hugos of essentially just being a factory for Tor to give itself awards).
In any event, he doesn't appear to be a lolcow.
They filed a trademark on the same day. On February 8, review was completed and the trademark recognized.
The 77 E. 110th St. address appears to be a condominium complex between Madison and Park Avenue. Swanky address.
The location: