All CPA marketers put their eggs in one basket. I’ve seen plenty of the greats go from zero to hero and vice versa several time in their careers. The smart ones learn to build their own business in the process and pimp their products to CPA newbies (where the real money is). So if your only focus is to make the most money you can I would advise you not to spend it all because that business model won’t last.
The concept of affiliate marketing on the Internet was conceived of, put into practice and patented by William J. Tobin, the founder of PC Flowers & Gifts. Launched on the Prodigy Network in 1989, PC Flowers & Gifts remained on the service until 1996. By 1993, PC Flowers & Gifts generated sales in excess of $6 million per year on the Prodigy service. In 1998, PC Flowers and Gifts developed the business model of paying a commission on sales to the Prodigy Network.