Brennan, one of the best things you mentioned is this: “Your subscribers are often most engaged when they first join your list, so give them an amazing first-run experience.”

From whatever I’ve seen, I believe engagement dips as the subscriber’s journey proceeds through your drip emails. Keeping the subscriber’s fizz intact is a challenge we all grapple with.

Besides, it’s important to keep measuring (What should you measure? Here’s a nice post https://quickemailverification.com/blog/all-email-marketing-metrics-marketers-should-know/) and see how you can feed the learning back into your system.