I would recommend doing the process described in this video AT LEAST once for each and every support website you have (in other words, one UAW article link to one ezinearticles.com article, one UAW article link to one goarticles.com article, one UAW article link to one blogger.com mini blog, one UAW article link to one hubpages.com article, etc.).
Additionally, I would recommend building a freelancing website as a side business (making websites for others), especially at the beginning while you are just starting to develop your passive income portfolio. This is a good way to consistently make some fast cash too (just two gigs per month will make you an extra $1000). Some freelancing advice on how I used to do it can be found here: http://mikeomarphotography.com/freelancing-advice/
On many of these platforms you do have the opportunity for students to leave reviews. We all know the power of reviews due to sites like Amazon. Reviews are extremely powerful and provide social proof that helps in driving more sales and profits. But to get good reviews don’t overthink things. Number one, focus on creating the highest quality and valuable content that you can on your topic. Then next you can prompt students at various points throughout the course to take action and leave a positive review or rating if they have enjoyed the content inside, to help encourage others to enroll. You can also incentivize them in some way in exchange for a review, like sending them a content upgrade or free report, video or interview. That’s really all I’ve ever done. Keep it simple.
The second mistake worth mentioning is that my email list includes a lot of people who followed me when I wrote more about budgeting, so the match wasn’t 100% aligned. I’ve asked people to unsubscribe who aren’t into the new “design your dream life” theme of my blog, but many still remain. This is totally fine from a content perspective, but it just means that selling to this list is harder.