This already happens, Facebook sometimes tests features in specific countries e.g. New Zealand before wider rollout. https://i.stuff.co.nz/technology/social-ne

This already happens, Facebook sometimes tests features in specific countries e.g. New Zealand before wider rollout. https://i.stuff.co.nz/technology/social-networking/103511194/facebook-test-new-downvote-button-on-new-zealand-users https://i.stuff.co.nz/technology/social-networking/103511194...