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9:üöíìÀ ƶÚDþµ=YftÏëLI'm not sure that protocol changes prevent mass adoption. If Mastercard change somehow its protocol it doens't prevent the user from using it
https://whatsonchain.com/tx/a89a12ca12595ddeab7fa3311291d99ef808026d429b9827f32519e1ba88987c