It immediately had good impact on the network and the sites that provide thousands unique visits and zero clicks (obviously faking most of their traffic) - instead of chasing and banning them every day, now we just don't pay them.
We are also making a fake clicks auto detection which we plan to punish faking clicks with subtracting 1 click instead of adding it, when calculating the revenue. This way we hope to prevent or at least minimize this kind of fraud too.