Subscriber Fatigue: When subscribers receive too many emails, they may become overwhelmed and less likely to engage with your content. Content Saturation: Repetitive or uninspiring content can lead to a decrease in open and click-through rates. Technical Issues: Problems with email deliverability, such as emails landing in the spam folder, can negatively impact your campaigns. List Decay: Over time, email lists naturally lose subscribers due to changed email addresses, unsubscriptions, or disinterest.