The 40/40/20 Rule of Direct Marketing
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JUNE 24, 2021
“I’m writing an article about the 40/40/20 Rule of Direct Marketing — ever heard of it? ” (We laughed. Sure,” I said — and so started a masterclass on one of the most important principles in direct marketing (one that will help you actually predict the success of any ad campaign you run from this day forward). Kim said.
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