[Rooger]

With money being taken out of the prize pool, I think it's fair not to tip anything.
But if you do tip, it's ridiculous leaving 100$ when you've won 7.5M $.
To use the restaurant analogy as many of you did - whether you choose to tip extra beyond the 17%, or whatever percentage is being withheld for staff, is up to you - but if you've eaten at a fancy restaurant and is paying 1000$, you don't tip 1 cent!

I don't think Hachem was obliged to tip at all, but 100$ is an insult to me - 1000$+ would have been appropriate IMO, if he wanted to tip.