I must admit I am totally a beginner with this. I am exploring my options to advertise my client's site that offers some products and services. We are targeting at high income customers. There is this site which have a large number of high income visitors.
Their Ad-views are 500,000 with click-throughs of 300 to 400 a month and they charge like 200$ a month.
While its good to get targeted traffic, is 200$ for 400 visitors too much?
Conversion. How many buy? How much do they spend? Then see where you are on cost per sale or divide the ad investment into the revenue return. If you get business and make money great. If you get business but don't make enough return or don't get the conversion to sales - not so good. Try a little bit of everything. Adjust or dump what doesn't work and triple-down on what does.