The only thing it's okay to play more is when you are doing it for fun because you are also betting smaller amounts, and you are not expecting to win anymore. In terms of jackpot, they can come in different forms. I already saw one who needs a higher bet for it to be hit, and maybe the longer the duration of our play time, the more the chance we get them.
One of the things that makes them only put a small amount first is not too much hope for big wins and secondly their goal is just looking for entertainment, so a small amount is enough for their gambling. They understand the concept of real luck which is always unpredictable, simply put even though you come with small capital but it is quite tolerable if you are lucky by getting a win. So don't ever think to put high hopes, because it's the same as you put a trap for yourself if the final result doesn't match and there will be disappointment that you feel.
When it is time for us to lose, we need to admit that and we should not deceive ourselves that we can still try more time to be lucky enough and increase the chances of us winning. Winning do not come like that, most time it comes with luck and when we don't have that luck, it's good for us to acknowledge that lose and come back fully prepared another time.
If you run out your budget just take a break otherwise your betting amount will be higher and higher. Spoiler alert at the and you will loooose all your money 
