What will you do with your gambling profits ?
Will you re-invest them into gambling or will you buy a car or home with them ?
If profits were so high I could buy a home with them, I would definitely stick at that point. Avoiding having to pay a mortgage every month is enough lottery for me, so I wouldn't "reinvest" that money again in gambling. On the other hand, if profits were small, then yes, I would reinvest, I think.