This is a great idea to ask for the permission of the subscribers before sending the emails for promotions to them. This might not be a great way to increase the sales of the site but still it has few advantages. First of all they will feel important if you ask for the permission. Secondly if you send them emails without asking for permission then they might feel that you are trying to force them to but your products. This will ensure the failure of the entire email marketing campaign and spill water on the dream of earning money.

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