I didn’t realize there was a limit until a few years back when I hit the maximum. I wish Amazon would increase it! To be honest, I find their tracking system pretty messy and think it needs an overhaul however, it is great for testing what works and what doesn’t. Most of what I’ve written about in other tips in these articles was learned through tracking.
The above three give you cash, but many merchants give you store credit. Examples of those would be Stitch Fix, thredUP, Zulily, The Honest Company and more. Whether those would be worth it to you will be dependent on how much you shop there. Stitch Fix will give you up to $600 a year in referral credit. That's $600 worth of clothes that I don't have to pay for. That's worth it to me. Once I hit that $600 mark, I switch out the link for their Commission Junction affiliate link so I am still earning on any signups after I hit their referral threshold.
Affiliate networks offer you access to multiple (and by multiple, we mean hundreds if not thousands) of individual affiliate programs. They basically work by simplifying the signup process - instead of applying to become an affiliate for a each product you want to promote, you simply apply to join the network and instantly have access to hundreds of different affiliate offers.