Today I took a quick glance at my affiliate stats (me selling other games). I realized that you need a very high number of downloads to be able to generate a sale. Plimus allows you to see a cool buynow hits / sales report.
Well, the average value was 1 sale every 150-200 buynow hits! (not talking about downloads, but people who actually visited the product buynow page).
Not very encouraging… I bet the top affiliates have really tons of traffic to be able to live from sales…or maybe they live with ads… 😉