Mr P 'Spunk' goals

Idiots or not, no one is holding a gun to their heads to tip, You would hope that it is money that they can afford to waste & they're not causing themselves or their dependents financial troubles.
Historically a tip has generally been given to those in poorly paid professions & often after you have received a service that you were happy with or were your expectations have been met or exceeded.
Tipping on these shows are no better than a hopeful punt, & with no comeback. It boils down to another form of gambling, most wise people know that gambling is for mugs.
Regarding the spunk/fake spunk issue, hasn't porn used various substances to substitute for the real thing either for a greater effect or because the performer basically couldn't perform. I mean the average ejaculation is only a teaspoon full not a bucket. Go figure.