I think we can try the method you are using because in my opinion, whatever the outcome of those two options, we should be able to stop so that we don't lose more than $100 or more than 2 hours. It's a great strategy to try and maybe if people think $100 and 2 hours are too big and too long, they can reduce or adjust their funds to enjoy their free time. I only use the first method where I put some money, maybe under $100, to play and once I have consecutive losses or the balance is reduced by half or a quarter of the total balance, I will quit. But sometimes, I also use other strategies depending on my mood.
How could you yield those 100USD in that way? What I can think is that a person who has 100usd is that he bets 1usd and that 1usd lasts at least 2 minutes, it can be a bet with poker games or a roulette and those games are sometimes very fast. a game of poker against the machine or computer is something that can happen very quickly, I say this from my own experience, always a hand of poker does not spend 1 usd either, you can spend 100usd, this can result for slots that I have no experience , but if you bet with less than 1USD it could be, but I think that a slot machine the chances of winning are slim.
First of all $100 was just for example. Why you decided that the bet is $1? And why i will lose every time? Choosing the game, waiting for a moment(probably), changing the game take time too. And as result we have, probably, about 40-50 minutes of really gambling in 2 hours in the casino. And even losing every round and betting every time $1 - i`d have at least about 1,5 hours for fun before i lose all my $100.