I believe there used to be a thread in Meta where you could submit your own, and upon review theymos would add them. I can't recall if this was a donator privilege though, it may have been.
Here's a quote by theymos from 2014 (so don't go posting in that thread, make a new one if you have any suggestions)
If anyone has any suggestions for new factoids, post them here and I might add them. Factoids should be:
- Interesting, informative, or funny. The ones I wrote (most of them) are mainly focused on Bitcoin technology and history, but other Bitcoin-relevant topics could also be discussed.
- Not obvious to 99% of readers. Ideally, readers will learn something from the factoids, and maybe even be surprised.
- Not offensive
- Less than ~250 characters
- Very unobtrusive. (Much less flashy than regular forum ads.)
I probably won't add factoids that consist only of links. The factoids are supposed to be interesting in themselves. (Donators each get to choose a factoid, which explains some of the existing links and strangeness within the factoids.)
I wasn’t sure if the factoids actually displayed on local boards: they are (which means I haven’t been paying any attention to them, essentially because I seem to be blocking them).
Due to them being displayed on local boards, one nice feature would be to have them appear in the language of the local board. Not that it’s going to be done on the current software, but were factoids to be ported at some point to the new software, I’m pretty sure people would help to translate the list to their local language. Of course it’s an additional bummer to manage, so likely to have no further reach than this post.
I like this idea, though as you say probably won't happen on the current implementation, as I doubt theymos will see this as a priority, and I don't think the current implementation has the implementation to only display it on certain sections. Though, it definitely makes sense to me to add this quality of life change eventually.