I can only going off what I have read

I can only presume there would be conflicting studies depending on the country citizens and whether there is religious involvement/influence of the country etc…
“
Current NFP users were…have a bachelor’s degree, and earn higher income than the other two groups. “
*“ Current NFP users generally had higher levels of education and income than former NFP users, and former NFP users had slightly higher levels of education and income than those who had never used the method…”
“
However, since retention is particularly low among women who are black and of lower socioeconomic status and retention is disproportionately high among women who are Catholic, white, and of higher socioeconomic status…”
“
Most of the participants were married (89%) and well educated; 73% holding a university degree…“
It’s good to know of the Missionaries etc work. At the same time, there are a lot of problems in the world and realistically they are limited to the amount of people they can reach.
It is less common now in today era in my country background, but still there are some people with many children live in poverty.
Same in country like Philippines.
Some people have 6 children, earn $10 a day etc…
Considering it is relatively cost free, it would be good for Governments to implement nationwide programme to teach doctors to educate people about NFP in poor countries.
I personally find the Ecuador article sad.
They will not charge the woman to put the implant in but they will charge her take it out…

If I be totally honest, IMO it borders on exploitation of uneducated.
Even in “western country” this can happen. Doctors can convince our migrant parents to do “extreme solution” to an illness as they do not have the education and/or language skill to question doctors knowledge.
Likewise these women are “promised” a solution to their problem but without receiving education what they putting into their body, will it cause potential worse side effect etc…
They need to receive education so they then can make their own informed decisions.