Hiding content on a webpage or hiding affiliate tracking code in links. Hiding content on a webpage is bad as it is against the guidelines of the mainstream search engines such as Google. Hiding affiliate tracking in a link is an acceptable and widely used practice. If you'd like more information, I wrote an article on why and how I cloak affiliate links.
While these models have diminished in mature e-commerce and online advertising markets they are still prevalent in some more nascent industries. China is one example where Affiliate Marketing does not overtly resemble the same model in the West. With many affiliates being paid a flat "Cost Per Day" with some networks offering Cost Per Click or CPM.
The topic you choose must have enough depth that you can create a lot of content for it. This is important for building an authoritative site, for search engine optimization, and most importantly, for the end user. If you don't have enough content about a topic, you're not going to be taken very seriously as an authority on the topic and it's unlikely you can convince someone to make a purchase from you.
1. EasyAzon flat-out didn’t work, and their customer service was the absolute worst. 2. Genius Links worked, but often the same products wouldn’t be available on other Amazon sites, and the link would redirect to another product or a search page full of irrelevant products… not ideal. Plus, I was getting more clicks, but not enough international conversions to justify the $9 a month [seriously guys, Amazon does not pay well haha]. Long story short: this is a complication to be wary of!
Many voucher code web sites use a click-to-reveal format, which requires the web site user to click to reveal the voucher code. The action of clicking places the cookie on the website visitor's computer. In the United Kingdom, the IAB Affiliate Council under chair Matt Bailey announced regulations that stated that "Affiliates must not use a mechanism whereby users are encouraged to click to interact with content where it is unclear or confusing what the outcome will be."