This screams of uneducated regret with a sprinkling of greed. How do you make your code open source but then not understand what open source is? Or even read the license?

It could also scream life changes. There are plenty of scenarios in which initially the pros of open source outweighed the cons and that has flipped today.

I can say that if I had spent years working on a blog platform with some decent side hustle income I may want to protect it better if I thought my main income might change, by choice or otherwise.