Some Math and Numbers (Score 1)

If 100% iPhone users are divided in 10% jailbreakers and 90% regular users and we assume that 100% of those jailbreakers actually pirate software (which is not given for sure) and pirating aswell as buying a software means you have a general interest in the software then we have a total of 12,5% iPhone users interested in a software which is divided into 10% (pirating iPhone users aka jailbreakers) plus 10% (jailbreakers) / 80% (pirates in software-interested users) * 20% (non-pirates in software-interested users) = 2,5% (amount of non-pirate iPhone users interested in software). But if you think about it most of the pirates would actually lose interest (aka not buy) the software if they couldn't pirate it and thus propably equalize with the amount of interest from non-pirate users. So what is the total amount of interest for software from iPhone users if they cannot pirate: 2,5% (non-pirate users interested in software) / 90% (non-pirate users) = 2,0% (users interested in software) That means only 2% of the total iPhone users are actually interested in the software if they couldn't / wouldn't pirate it. But if only 2% of the 10% pirates would actually buy software if they couldn't pirate it, then that would mean, that only 10% (jailbreakers) * 2% (users interested in software if they couldn't pirate) = 0.2% of all users currently pirate software that they otherwise would buy. That is like - nothing? And it is exactly 10% of the current number of users buying software. So instead of increasing sales by 400% software developers would increase their sales by a "whopping" 10%. What a pitty.