Non-paypal ad networks are paying much better for low traffic websites

One of the trends which most of the popular bloggers are not covering, is that Non-paypal ad networks are paying much better for low traffic websites
The domain investor is very frustrated by the extremely low cpm/ppc advertising revenues
So she is experimenting with various ad networks to cover domain renewal fees
Almost all of them are paying better than the paypal ad networks, which are showing zero revenues