Way back in time, before I was sent to the dungeon, I answered an extensive reply to one of her posts. Yes, I enjoyed typing it up. There was no initial thankyou or subsequent one, or stars. Whether the lady in question ever read the reply I don't know. Like in the outside world, I do believe that a please or thankyou does not go amiss.
If I have nothing better to do, I may just answer a question from her again.