We visited Diriá Coffee in Costa Rica. They are a cooperative of farmers who sell 90% of their coffee to Costco as part of their Signature brand. Costco's Costa Rican coffee is a mix of beans from Diriá and a supplier near San José.
It turns out 30,000 families in Costa Rica still make their living picking coffee in Costa Rica. They have passed laws to ensure the country protects its reputation as a premium coffee producer, such as making any other bean besides arabica illegal to grow in the country. Also, mechanized picking is against the law for several reasons, one being the belief that pickers make sure only the beans on the plants at the peak of ripeness end up being picked.