The whois data for domains under this TLD is kind of interesting

whois stackoverflow.feedback returns a phone number with a CNAM of STACK OVERFLOW, and the same address listed on https://stackoverflow.com/company/contact

whois google.feedback returns the phone number +1.1978600872, which is not a valid US area code last I checked. The address appears to be a PO box in Seattle.

facebook.feedback has the same bogus phone number and the same PO box as google.feedback.

myaccount.feedback (where they send you if you try to vote on anything, presumably other things too) has a residential address on Mercer Island, WA and a Google Voice number listed.

Calling the Google Voice number results in a voicemail where a person identifies themselves as "Jay" (presumably Jay Westerdal[0] of Top Level Spectrum, Inc who owns the .feedback TLD[1])

Another thing of interest is that myaccount.feedback encourages you to login with Google/Facebook/Twitter/LinkedIn

[0]: https://icannwiki.org/Jay_Westerdal [1]: https://icannwiki.org/Top_Level_Spectrum,_Inc.