Congrats on that success!
So this is an important matter. I think (I am sure actually) that this progressive jackpot hit should NEVER result in any negative for you as the progressives are already accounted for. This is what I was told, and it makes sense. If it were an in-house jackpot then it’d be a different story but a progressive should not affect you in a negative way. Can only be good for you in case he or she continues to wager with his winnings.
What bugs me though is that things like that are never fully confirmed by the programs. I know because I asked many and got various different responses.