This actually makes me really angry because one of the most common things I hear about jail breaking, is that you can get all the apps for free. Don't people know that this is stealing, if I came round your house and stole your TV or computer, what would you think, you would be outraged because I had burgled your home and stole your belongings - the things that you had worked so hard to earn the money to buy.
Likewise jailbreaking your iPhone just so you can download the apps for free the same sort of thing. People have spent a lot of time and money creating these apps and if they are then stolen that company loses out on its income, which means they can't afford to do updates or fix any bugs with their software or create any new apps.
Now if you are jailbreaking simply to get access to the hidden settings, then that I can tolerate but even this does not make sense. There's phones out there that come per-jailbroken and provide the end user with a nightly customisable set of settings and features… The operating system is called Android and the most well know manufacturer is reshape Samsung but there are many many more.
So jailbreaking an iPhone makes no sense to me - either financially or technically.
Therefore why do people do it