The advantage for them is you don’t need to make that much money every month if you stay in Cambodia. I think with 500 EUR a month you can live a nice middle class life there. 100 EUR for rent of a room. 100 EUR food per month. 300 EUR left for nice things.
These digital nomads can this way easily out compete young people living in richer countries. They just can do the same job for a far lower fee.
Or as I said before. It are students. Classes are online now. They just stay in Cambodia living from monthly allowance parents and follow the classes online. For the exam periods they fly back home