X appears to be juicing MrBeast’s views to woo the YouTuber to the platform, pushing video upload into users’ feeds as an unlabeled ad::undefined
They mostly advertised other comics and merchandise from other comics, if I recall correctly.
Also, Adblock originally released in 2002, and Adblock Plus came out in 2006.
I do recall one of the reasons I respected webcomics ads was they weren’t ones that were animated, blaring music, or asking me to try to play a mini-game by clicking on something that specifically can’t be caught by your mouse.
