Как учиться на чужих ошибках: 5 Ошибки крупнейшей маркетинговой кампании по электронной почте

Email marketing is one of the most effective ways to stay in touch with your customers and increase your return of investment (ROI). In fact, studies show that for every $1 spent on email marketing you can expect the average ROI of $42. …
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