The lost art of customer retention #THINKmarketing @BrennerMichael https://t.co/rfxUQ28hK6 https://t.co/Ns4f5fPTwA The lost art of customer retention #THINKmarketing @BrennerMichael https://t.co/rfxUQ28hK6 https://t.co/Ns4f5fPTwA Tweet Pin It