I have no interest in buying any forum accounts, however two months is really not a long time to make your money back and then some. There are few other investment opportunities that will allow you to make this kind of money.
Sure, 2 months isn't a long time for an investment, but you have to consider it's an investment that requires work: namely, posting over 400 times, which not something everyone has the time and/or patience for. Also, PD is planning on changing its payment structure, so there is no guarantee this would even be profitable any time soon - and we all know how stable most other campaigns are.

You are correct that there is no guarantee, but if you were to buy the account now then you can earn .48 this money (stunna said he is not going to change payment structure this month) and you would almost certainly earn more then .02 next month so you would still easily ROI in less then two months.