Janny - The "Janitor - He Does It for Free" meme originated on 4chan. Janny refers to "Janitors" or "Jannies"

Janny memes often refer to "He does it for free" - refering to the unpaid efforts of an internet moderator.

Jannies can be tetchy, pedantic BUT are also the responsible, UNPAID and unsung heroes that clean up others mess.

Janny is an established meme on 4Chan, where it is widely used. For a full background on Janny see HERE.