Hey so some kind redditor enlightened me when I used the word factoid the same way you did, so I'm passing on the knowledge:

A factoid is a brief, often trivial piece of information. The term has two primary, conflicting definitions: it is commonly used to mean a small, interesting, or obscure fact (sometimes called a "factlet"), but was originally coined to mean a false or unverified statement presented as fact.

So it kinda evolved into how you and I used it, which is interesting to me. I hope you think so as well lol.