honistly I think you hacked the forum not me
and no im not paying $100
$20 maybe as I do like to learn loosely how things are done
not to the technical side of reproducing it
but just to have an idea of where the risks are
I'm almost 100% sure you were hacked. Why would someone hack the forum and target you? Makes no sense. Sounds like you're in denial about it being your fault your account(s) were compromised. I really hope you figure out what happened soon and this doesn't repeat itself here and elsewhere again and again.
Good luck man.
EDIT:
Just seen your last reply. Brute forcing the password you claimed would be EXTREMELY hard to do, almost impossible without taking quite some time.
I hope you're taking this serious before other accounts are compromised too.
As for the fool trying to get you to pay, don't. Not even $20. How the fuck can you believe anything that guy says? How do you know he still doesn't have access to your account even though you changed your password?