So they spent so much time and effort on making older iOS devices to look like iOS7? Why? What is the return on investment there? And it only works on jailbroke

So they spent so much time and effort on making older iOS devices to look like iOS7? Why? What is the return on investment there? And it only works on jailbroken devices (I am assuming). So how are they getting their money on this? I am being really cynical here but the first thing that came to mind is, are they peddling malware or syphoning off user information under the hood?