Avoid ‘affiliate theft’ at all costs. There are several illegitimate methods of increasing your commissions, which are collectively referred to as ‘affiliate theft’ or ‘commission theft.’ As such, you’ll need to make sure you only use proper, disclosed links at all times. Otherwise, you might end up like the scammer who used affiliate theft to steal $28 million from eBay.
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.
The three above examples are “referral” programs. That means you become a user of the platform yourself and they add more money to your account as you refer your friends. (Look for the refer-a-friend link on your dashboard.) These can often be more lucrative than their affiliate program counterparts and they are offered by so many companies these days.
After being accepted into an affiliate program, marketers receive a unique URL that includes their affiliate ID. They share that unique URL with their subscribers, site visitors, and social networks via text links or ads. When someone clicks on that link, affiliate software records that click and any resulting product sales in the affiliate’s account. When commissions reach a pre-determined threshold, the affiliate is paid.