Ecuadorians are very touchy about the condition of their paper bills. I tried to pay for a Panama hat with some cash that included a slightly torn but fully in tact $10, and the shop owner refused. As such, more durable dollar coins, which were minted by the US but never really caught on, are quite popular.

Interestingly they do mint their own coins, with Ecuadorian half dollar, quarters, dimes, nickels and pennies. https://en.m.wikipedia.org/wiki/Ecuadorian_centavo_coins