They don't browse the boards even more.
One time I posted a webm from a Yuru Yuri episode and asked anons on /a/ who their favorite "Yurituber" is, anons who watched the show got the joke because it was about the most recent episodes where the characters become "alive" and turn into their voice actresses.
They brought me back from the vacation 15 minutes later when I posted about it on /qa/ (when it was still a thing, and on topic).
Now you can get a vacation for literally anything, and they don't give a flying fuck.
You can post whatever you want wherever you want in a board as long as it is the topic of the said board.
For example, you can post about iPhones on /g/ in general, but if you post on /pcbg/ posts about the iPhone, they don't mind because it is on-topic.
Goobergate is when they stopped giving a fuck, 2016 was the final nail in the coffin.