How aggressively do you clean your list? At the beginning of every month, I use various Substack filters to identify users who:

1. Subscribed at least six months ago

2. Have never clicked on a single link within my newsletter

3. Haven’t opened an email in the last 30 days

4. Have an activity level of less than one star.

If someone meets all four of these criteria, I assume they’re completely unengaged and remove them from the list.

UPDATE: Some people are claiming in the comments that this would remove people who read my newsletter in the app. No it wouldn’t. My #4 on the list accounts for whether people are viewing my newsletter in the app + on the web.