Channing and James were behind a lot of marky and sam posts on 4chan and had many accounts on kiwifarms they used to post on the sam hyde thread. Channing capitalised on fishtank's popularity and visibility on /tv/ to spread the marky stuff further, trolls and fans wanting to mess with sam hyde adopted it from there. you can tell it's channing because she always goes on weird unhinged rants about Sam instead of the usual "lel MARKY". She posts here too, you can see her right above.