There are multiple reasons why subscribers may choose to opt-out: - Irrelevant Content: If the content of your emails does not match the interests of your audience, they are likely to unsubscribe. - Too Frequent Emails: Sending emails too often can overwhelm and annoy subscribers. - Poor Email Design: Emails that are difficult to read or navigate can frustrate recipients. - Lack of Value: If your emails do not provide valuable information or offers, subscribers may not see the point in staying subscribed.