So after 8 months on the road in South America, navigating with Osmand, I'm now number 37 in the world when it comes to opening/closing notes. I make the notes mostly for myself, so when I get the time (and access to good wifi), I fix the problems I spotted.
Twice in Ecuador and once in Peru it happened that local mappers spotted the errors and started fixing them. A big thank you to users giomaussi, Diego Sanguinetti and agranizo! But that means that in large parts of Peru, Bolivia, Chile and Argentina no-one is watching notes.
If you feel like doing some random mapping in South America (mostly Argentina and Chile now), please feel free to correct some of my notes. If something isn't clear, I do respond to questions. Here's a direct link to my notes page