The silent majority within an online community that does not contribute to the vitriol of the comment section. Chillbros show their approval through "likes" or "upvotes", not feeling compelled to discuss the content.
"Wow, there's 500 angry comments on this video. People must hate this guy."
"Nah, there's 2,000 likes on it though. Chillbros, the real fans, approve silently."