I haven't looked into it, but without an explicit "moonlighting" agreement, no Microsoft employee could make money from this. And if an employee *did* want to make money from it, the employee would have to use all non-Microsoft equipment and get the developer tools the same as anyone outside the company would.

It might be an indirect route to money since a good app might make you famous and you could parlay that into a new job or business, but it's not going to be directly from this.