Affiliate marketing can be a lucrative way to earn commissions and get services / products for free but you do need to be cautionary when using this method. There are rules to affiliate marketing and it is best to look up these rules before diving deep into affiliate marketing. For example: you are supposed to disclose any affiliate links when you use them.

The best place to look up these rules before proceeding is on the FTC website. Remember, even though that is a US-based website, you still need to stay compliant as the web is an International space and you will get visitors from the US to your site.