Ellis Hamburger
So far, the tool has been used to hack about 7 million devices, likely making evasi0n's tool the most popular jailbreak ever. That figure comes from a Forbes interview with Jay Freeman, who operates the alternative app store Cydia for jailbroken
Evasi0n's popularity shows that there are a ton of iPhone and iPad owners out there who want to do more with their device than Apple allows. For example, jailbreakers can customize their devices with better controls for managing Wi-Fi and other basic settings, add widgets to their lock screen, and install apps that make it easier to tether their phone to their computer.
It also points out the benefit of non-Apple devices like those based on Android, which offers a ton of customization options.