EasyHDR is a well known HDR photo processing software that has been out there for many years (first release in the year 2006). However, the world is a big place and there is a stable flow of new people turning their attention to photography and HDR image processing, which ensures the big potential of the market. You can be a part of it!
EasyHDR is sold through Digital River's MyCommerce/Share-it system which offers an affiliate program. If you want to earn money by advertising easyHDR software, all you need to do is to register as an Affiliate for easyHDR and start promoting easyHDR on your website, providing a "buy now" link for your visitors. You get percentage of sales made by people who found easyHDR through your website. Please contact me so we can agree on the rate.
The more you contribute to promoting and selling easyHDR, the more you earn. You can get the best results by creating a HDR software comparison web page, or an article, or blog post about HDR photo processing, with perfectly crafted examples, pointing to the software purchase.