It is not easy to hit 100x exactly, and it is given out to first person to do it, and it requires 0.5 cents as well. Which means you have 200 tries at best to hit it, whereas it is a lot lower odds to hit it exactly. Which is why I would say this is not viable to do, I usually calculate what are the odds of me doing what being asked and what the reward is, if the reward worths it I do it, if the reward doesn't worth it I will pass.

This is not "money for all who does it" it is only for the first one, which means you could be too late, but if it was to all who does it, I would say 550+50 (from winning the wager) would be 600 and hitting 100x in that many times would be really possible and would make it profitable for you, so if it wasn't only the first one, it would be awesome.