Main source of income. I've now saved enough for 3 years if ebooks stop selling (which is a real possibility - most of my readers are from America/Europe/Australia and they would be able to subscribe to AI tools instead of learning from books). I'll probably try in-person local tutoring, look for other options, etc.

And $150/month really provides a comfortable living for me in the outskirts of a city :)

150$ from "thin air" every month is nice addition in developing nation. Not something what would change the lifestyle but something what you can easily spend on things you like - books, courses, etc.

It can be enough to change the lifestyle. I'm working with a charity where we're increasing people's income by $90 a year and that makes a significant difference to their lives