This model is borrowed and adapted from venture capital. It's based on return on a risk. As in VC, many ventures fail or have minimal returns, yet VC as a model is successful. Why? Because small percentage of those makes up for the loss on all the other investments. It's a "game of numbers".

As in VC, amount of success would vary. Smart choices would lead to good outcomes, and all is up to you if you're willing to take such risk and what choices to make.