Ok, this just popped up...
"SORRY, EXPLODING POSTS REQUIRED A PRO ACCOUNT"
I have a couple of questions.
1) I wasn't doing anything, what caused it.
2) WTF is an exploding post?
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@CriticalCupcake
You probably hit that little clock symbol at the bottom of your post, the one next to the Content Warning "CW" button.
The idea that the post will self-destruct after a period of time, for whatever reason.