Why most trial sequences are ignored
The typical sequence is written as a calendar: welcome on day zero, features on day two, a case study on day five, a nudge on day ten, an expiry warning on day thirteen. It sends the same content to someone who set the product up on the first afternoon and to someone who has not returned since signup. At least half the messages are therefore irrelevant to any given reader, and readers generalise quickly from irrelevance to ignoring the sender.
The fix is not more sophisticated copy. It is a branch. Once you know whether the person has reached the core value, the right message for each group becomes obvious and the sequence gets shorter rather than longer.