According to my understanding targeting developing and third world countries to place bitcoin ATM machines will not do anything effective because Bitcoin is another level of digital advancement which required at least basic level of technological improvement to understand, use and do transactions by using the network which are not common among many citizens who are in both developing or third world countries so nothing effective can be expect if ATM machines are placed in such areas
I think you underestimate the level of competence you'll find among the youth in these countries.
The use of BTMs here can have quite a significance, considering these individuals have high technological understanding.
Because of the state of their country, high tech payment solutions aren't available. These individuals will have a higher income and all you need for paying in crypto is a internet connection.
Sure it won't have the same impact as in north america, but i'm sure there's a market for BTMs.