Their emails show they're part of Conde Nast, all under the Advance Publications conglomerate that includes:
Allure
Architectural Digest
Ars Technica
Backchannel
Bon Appétit
Condé Nast Traveler
Epicurious
Glamour
GQ
Ideas Publishing Group
Next Gen
Pitchfork
Reddit
Self
Signature Magazine
Teen Vogue
The New Yorker
them.
Vanity Fair
Vogue
Wired
Thank you!
Nuff said.