I have heared about CPA many time I just know it by name i.e. Cost Per Action but never used it. I have also heared that many folks have derived lot of benefits from this but due to lack of knowledge I have not used it yet.
So thanks jimmyD for asking such a productive quetions and thanks a lot to All of you for explaining CPA with top list also.
Right now I am collecting useful stuff related to this and when I get sufficient knowledge after than I will jump in this networks.
Keep sharing such type of stuff it will be highly appreciated here.