As a solo dev without doing freelancing, I need to make products and sell. Some products don't perform well and this is a map I create to clear the fog:

As I made the map, I realized one very important thing:
=> I think money is more valuable than my time (spending on ads is bad and spending time on writing, making videos is good).

This could be a fault in my thinking.

So, what is your approach to marketing your products?