In a case where a gambler loses several times, it doesn't seem fun to him as he would want to chase profits to cover up his losses. So if the mindset was for fun or entertainment, he would find himself chasing for wins and thus it's no longer fun anymore. Losing in gambling is bound to change our perception in gambling but when we are winning, we still dare to say we are either gambling for fun or for profits.
If a gambler losses many times, he will not gets entertain from gambling because he can not enjoy his gambling activities. His emotion can increase and will trying to recover his lost money.
His mindset will change when he lose some money and will not trying to see gambling as an entertainment because his minds will tells him to recover his lost money. That will makes him spends longer than usual and he will use more money to gets his money back.
But that doesn't mean he can gets his money back because gambling is not like as source of income. That is why he must manage his minds when using gambling and only treat gambling as an entertainment.