I mean why not? There was a math guy who wanted wider viewership for his calculus lectures than he was getting on youtube, so he started uploading them to a porn site and built up a steady audience and income there.

Added: did web search, maybe this is the guy, not sure.

https://www.vice.com/en/article/math-tutor-video-lessons-por...

https://www.reddit.com/r/IAmA/comments/v3e8ye/i_am_changhsu_...

Oh here's another one:

https://www.unilad.com/community/zara-dar-pornhub-machine-le...

That one mentions that Pornhub pays around 2.5x as much per view as Youtube pays, so it's an obvious win.