About payments and referrals

I must say that I started earning from the above sites only after I rented referrals. This is my main problem: I have no referrals of my own, so I decided to rent them.
But I also started my link sharing activity with the following traffic exchange sites:

These two are practically twins. You click on ads and earn credits that you can spend exposing your preferred URLs to their community. It is also easy to gain direct referrals.