if you use twitchclient 3, you can welcome new subscribers automatically right after they subd
nightbot doesnt do that at the moment

Code:
on *:text:*subscribed*:#: {
  if ($nick == twitchnotify) { 
    msg $chan hey $$1 thanks for subscribing blub
  }
}



you would need to change that code though
Code:
on *:text:SPECIALUSER & subscriber:#:{

to channel instead of query