ClickBank is being an intermediator between affiliates and product owners where both wanted to make money. Product owners can advertise their products on ClickBank mentioning with the unique features and commission rate. Affiliates select a product based on the authority and commission rate that meets their requirements. Then they start marketing or promoting in their own way.
The more traffic you have, the more money you can make with ClickBank. In order to maximize your traffic, you should spend some time identifying commonly searched keywords that relate to the product you plan to sell. If you create articles and other content based on those keywords you can often get some traffic from search engines, especially if you target the less competitive long-tail keywords in your niche.
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ClickBank aims to serve as a connection between digital content creators (also known as vendors) and affiliate marketers, who then promote them to consumers. ClickBank's technology aids in payments, tax calculations and a variety of customer service tasks. Through its affiliate network, ClickBank also assists in building visibility and revenue-generating opportunities for time-strapped entrepreneurs.
If you have pop-ups and optins on every page, I would have to think that it would be a lot harder to convince someone to link to it. Especially since the pages where you have your optins (and probably receive the most traffic) are probably the same pages that you have your best content on as well that you'd be hoping to pitch in your outreach campaign.