Hacking in app purchases is a form of warez and is totally forbidden on xda. Anybody who helps you runs the risk of having limitations put on their xda account. So please don't ask about hacking in app purchases or getting paid apps for free. Rule 6 is pretty clear: 6. Do not post warez.
If a piece of software requires you to pay to use it, then pay for it. We do not accept warez and nor do we permit any member to request, promote or describe ways in which warez, cracks, serial codes or other means of avoiding payment, can be obtained. This is a site of developers, i.e. the sort of people who create such software. When you cheat a software developer, you cheat us as a community.