All the time I get support tickets asking me where I promote and where I get my traffic from etc. People just want to know how I make a full time living online marketing but they dont seem to see my sites around a lot.
The answer to that is I probably dont get good enough results at the places that you are using etc.
I track my advertising and like to use the places that not only bring the most signups but the places that bring the most sales too.
Some argue its about numbers in Traffic Exchanges etc ie the more you get seen the better but its more than that,