Tipping for running a jackpot??? I've never heard of such a thing! And, I can't say that I feel it is justified either.
Around here, when they run brackets, the fellow who is running the brackets does get a cut out of each bracket payout, but that cut is determined up front. The fellow running brackets gets less than 10% for doing all of the bookkeeping, bringing his computer for the brackets, and chasing down the scores each game. In fact, when the bracket fellow is bowling at the same time, he will often get one of the younger girls in the center to chase down the individual scores, and he gives her a cut of his cut.....that way all he has to do is to enter the scores at the end of each game and post the updated sheets on the wall.
But tipping for a jackpot??? Not no, but (deleted) NO.