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They're either looking for attention or they're looking for validation.
If they're looking for attention they understand that the most precious prize is an engaged audience and this is something that can't be commanded. It must be won. People who are keen for attention will be attuned to the mood of the room and will pull back the audience's attention if they feel it wandering.
On the other hand people who are keen for validation think they've done the job just by securing the gig. They won't talk to the audience any more than they have to and if they do it will be just to tell them what the next song is. If the audience aren't paying attention they don't really mind because they're quite happy playing their music. They're not prepared to change that in any way just to win the audience's favour. If people don't happen to like it that's because they're wrong.
It goes without saying that the Lottery Winners belong in the first category. As does anybody whose career last more than a couple of years.