Megas_SLR doublevr I found out about this when I wanted to copy a post I already made in its BB-code form so I could reuse the same layout for a model suggestion thread, just changing the model name, socials, and the HTML for images. If you check, the last few threads I made all follow the same format.
I've used the edit option a lot before to update model info in the original post, like when they change their socials or agencies.
The reason I said there's no specific pattern for which posts can be edited or not is that, for example, I was able to edit this post from a month ago, but couldn't edit one I made just a day ago.