Coupon sites usually don’t drive new traffic. They don’t even help convert site visitors into customers. Instead, what happens is your site visitor has already decided they want to purchase but is looking for a discount on the Internet. When they Google, regardless of whether you have a working coupon out or not, sites like RetailMeNot will show up (they even show up when you are not paying them to be an affiliate). Once your user clicks on them, their cookie gets placed and the sale gets attributed to them. That means you’ll have to pay your affiliates commission for a sale that would have happened anyway without their involvement.
I totally agreed with you that affiliated marketing pay the bill more that AdSense does. I was reading a post on bivori that was shared by Reginald on how he made $405 in a month from affiliated marketing yet he made less than $5 from his AdSense account that same month, meaning that he ventured more into affiliated marketing the more rather than AdSense, but the fact is traffic is the real back-born of a successful affiliated internet marketers and choosing the right niche.
File-Sharing: Web sites that host directories of music, movies, games and other software. Users upload content to file-hosting sites and then post descriptions of the material and their download links on directory sites. Uploaders are paid by the file-hosting sites based on the number of times their files are downloaded. The file-hosting sites sell premium download access to the files to the general public. The websites that host the directory services sell advertising and do not host the files themselves.
There are more than half a billion active websites under the sun and most of the (almost 70%) of them struggle to get traffic due to the high competition and expense of the process like SEO or Digital Marketing. However, you can simple buy targeted traffic from various sources at any time you want! Every paid ad campaign is an attempt to get traffic in exchange of money. However the reasons behind getting traffic are pretty different from each other. Some people buy traffic to get sales, some buy traffic to get leads, some buy traffic for brand exposure, some buy traffic to gain authority and improve rank on several metrics and so more.