Very good point Germano
Most countries charge a fee for visa on arrival or prior. It isnt the end of the world, its call reciprocity fee. If you come from a country charging Arg to visit then you are likely to be charged to enter Arg. If you dont produce evidence of said paid fee, the airline won't let you board. No more tears please.
Ecuador doesnt charge foreigners to visit yet most countries used to charge Ecuadorians. Kind of unfair uh? Yet for the past couple of years there is a huge expat influx...and those same expats are opening the way for Ecuadorians. Look like just like in a personal level, Gov kindness towards other nationals open doors...