>>98569167I'd say the biggest reasons rather is the fact that /a/ (anime/manga) and /v/ (video games) are very broad spectrum interests and most people with more niche interests will likely have things they like in those spheres as well.
Furthermore, they are also the and one of the oldest boards on the site, and people who post on smaller boards now have likely posted on them in the past as well.
/vt/ may be fast as, let's be honest, the biggest forum style chuuba and chuuba accessories community online (not counting social media), but if you're not already interested in that the demographics don't overlap as much (lots of you are xitter tourists).
