I’d say that the jackpot is build up from a small percentage of every bet made by all players. So the jackpot isn’t a loss for the casino and thus no loss for you.
However if this player withdaws like 1,3 million and leaves about 100k in his account to play with… You should be one happy camper, since you should recieve commission on the losses he makes..
One should always be happy with a jackpot winner.. Most of the times it’s good for the player, the affiliate and the casino.. so everybody is happy.. 