Yes. Affiliate Marketing is a Real Business. But will it work for all ?No. I tried to advertise random associate links from Click Bank or even after few years not a single sale.
So I shifted my center around single niche which was stock market and have become a success with some biological google traffic. Real industrial came by themselves through our website for partnership and I still have revenue share partnership with them. You can mint money in Affiliate advertising and marketing only if you become a professional or spend abundant time in a particular niche to understand what works. If advertising has been easy, there will be NO NEED for associates. That is complicated, hence the choice of getting associates.
Because real commercial and groups don’t mind sharing income instead of wasting money on unknown effects.