How to earn from cpa marketing without investment in 2017?

hey guys,
I'm struggling hard to earn 1$ a day from free cpa marketing.I don't have any money to invest.in 2017 most of the method of free traffic is not working.I have tried a lot.IS THERE ANY METHOD WHICH CAN BE USE TO EARN A DECIENT MONEY FROM CPA, from free traffic .Which method will be best for me to try in next month to earn atlest 300$ for free.I know it is quite hard to believe that there is a way but If there is then please let me know.It will be a huge…

How to earn from cpa marketing without investment in 2017?