Do no forget to check www.pay-per-install.com there you can rate and discuss particular PPI programs also.

As I said here you need website with traffic or some software to bundle PPI with.

Both cases will make you work.

If your website is not member based like forums than PPI is OK but you should know that it scares visitors so if you dont give them nothing for free they will not install and never come back so you loose here. But if you have new and new visitors than you dont have to worry if they come back and here you can use PPI.