Reversely, paying 1$ in not much when you'll be travelling 25% of the world.
In my very basic example it was 20 000$ payoff for travelling 25% of the world. Let's make it 1 000 000$. I'm still winning.
Covering 25% of the world's surface is almost impossible. Yet, with my app idea, people would have most probably paid for taking the 1$ challenge (i.e. paying 1$ to participate, winning 1M$ for being the first to achieve the goal).
To expand on my concept, there would have been teams, anyone could create a new team, creating teams would have been free, people could have joined as many team as they wanted.
It's easy to go viral on these stuff. Every participant would probably call their friend oversea to tell them to join their team on this particular challenge, i.e. paying 1$ with the 1M$ reward in sight. The reward would be splitted between participants of the winning team (pro rata the surface covered).
