You would be surprised to find out how reliable luck can be in some situations. But definitely not when it comes to gambling. So in that case, I'll choose situation B since it offers me a much bigger chance at winning albeit the grounds for such victory comes in the form of defeating other real people. This could still work because my chances at winning is directly proportional to the amount of skill I have over my enemies'. I just had to be the best guy in the room and I will be winning, with option A no matter how much skill you have if the house decides to one-up on you, you have no choice.
I'll choose the B.
With that amount, you can burn that so quick if you're playing those games indicated in A. And when you keep on going, I guess within less than an hour if you're unlucky, you're about to stop because you've got nothing left anymore. While in B, if it's competitive, you're encouraging yourself to win and be meticulous with every decision you play per bet.
That is true. We're betting on the longevity of the $100 initial bet that you have been given, so there's a good chance that even if you start with low base bets, you'd still pretty much dry your funds up in no time which is not a good thing. Option B gives you more bang for your buck and extends your money's longevity, since you'll be competing against other people and the results are entirely up to your skill compared to theirs.