They wrote a question they have wanted to answer but no one else every posted.
It’s usually a new account trying to get karma. So they’ll have a cool story and then write a question that will allow them to post that cool story as an answer.
Nothing necessarily wrong with that I guess.
I used to do this because I would want to get my thoughts out there but then I realized that I shouldn’t do that shit. Its gae.
Delivering a punchline to a joke often involves answering one’s own question.