Shorted version of the phrase "In on page 1". It is used on internet forums as a form of gamesmanship to signify that a poster managed to post on the first page of a rapidly expanding thread expected to reach multiple pages.

Someone who is possessed by clout chasing. The original human is now gone and a demonic entity that feeds on clout is all that is left. An empty shell with no control of their actions, forced to blindly react to situations they think will bring them attention.