Crazy Taxi Gazillionaire, later called Crazy Taxi Tycoon was a free to play clicker style management game for Android and IOS released in June 2017. The servers were shut down and the game discontinued in May 2020.
The idea of the game is to make as much money as possible in order to upgrade your drivers, obtain new drivers and cabs, unlocking new parts of the city, with the more you unlock the more money you make.
Gameplay for the player is extremely limited. The player could tap helicopters and a few obstacles to break it open for more cash, but for the most part the game played itself.
For more of the new drivers please visit the Crazy Taxi Gazillionaire Gallery. There's a LOT of them.