It appears that Backchannel is an official Medium thing with a different focus - https://medium.com/@lotto/would-you-like-to-pitch-medium-s-in-house-publication

It appears that Backchannel is an official Medium thing with a different focus - https://medium.com/@lotto/would-you-like-to-pitch-medium-s-in-house-publications-matter-and-backchannel-27cb772e6705 https://medium.com/@lotto/would-you-like-to-pitch-medium-s-i...