Just tried a few, and only made a few. So it's not really that profitable unless you know some a large group of people who can help you and make them use the platform. Even though people nowadays wants an easypeasy money, still they don't want to try those referral things as for the majority of them in the past only made a fake affiliates. So the efforts has been wasted and they only made the people looked dumb for advertising their platform for free.
You really can't hope to earn anything if you don't put the time into it.
I mean, the tips on the website of OP are useful, but they don't mention how much time it takes to build a profitable affiliate business.
Just setting up your social media pages and getting enough real followers on them is a pretty difficult task that takes months.
Building your website isn't that hard, but getting visitors to it will also take some time.
I've gotten quite a few referrals which have earned me a nice bit of side-income, but it also took me a while.