Ahhhi tried to do it like this:
Code:
raw USERNOTICE:*:{
  if (($msgtags(msg-id).key == sub) && ($1 == #)) {
    var %nick $iif($msgtags(display-name).key, $v1, $msgtags(login).key)
    VAR %sub-plan $replace($msgtags(msg-param-sub-plan).key, 1000, $chr(36) $+ 4.99, 2000, $chr(36) $+ 9.99, 3000, $chr(36) $+ 24.99)
    if ($0 == 1) {
      msg $1 Thank you $msgtags(display-name).key for subscribing with a %sub-plan sub! 
    }
  }
}

But whenever someone subbbed it wouldnt detect anyone subbing