As an example, article writing. I am a published author and have made income through freelancing. Good standard on EzineArticles, understand SEO. Have 100's of articles on the net, some winning official accolades. Yet my traffic from these sources is modest to say the least. Hey, if article marketing is hitting major league home runs for you then more power to you! Just detailing 'my' experience here.
Why I prefer paid traffic. The supply is limitless, it is very often well-targeted, is scalable and, when done well, converts like a gold mine! Yes, you need a budget. And yes, you need to reinvest a percentage of your earnings to keep the momentum flowing. But let's face it, the lifeblood of any successful website is a good and consistent source of performing traffic. Simple!
Many top-level marketers claim that paid traffic is the only real game in town for the serious online entrepreneur. Argue this any way you wish but I want to earn decent money on a consistent basis. Working my fingers to the bone on tedious work heavy tasks just doesn't cut it!
Your traffic crusade may not be the same as my traffic crusade but I am clear on what my marketing destination is and about the prize that I'm really seeking!