Onahole Forums

Today I was browsing my favorite maker of anime with a story,
Pink Pineapple.
There I saw an
insignia
which looks like our novice insignia.


Where does this insignia originate? What is its history?

Symbol for "beginner"
https://en.wikipedia.org/wiki/Shoshinsha_mark
(in these forums it's a "rank" for users with less than 10 posts - a quick visual information that this user is still new and may need help)