What you need are nulcash.. Read below...
originally written by Root:
NullCash is a system where you can make money by contributing to the site. The working logic of the system allows you to download add-ons and themes with the money you earn. The table below contains the acquisition and expenditure details.
Create New Thread +11 NullCash
Create New Post +7 NullCash
Liked Your Post +7 NullCash
Likes Thread -11 NullCash
Likes Post -11 NullCash