I think there is not much I can do to make inactive affiliates active, except following up a few times over time.
I decided to focus on active affiliates and to look for new affiliates instead of focusing on affiliates that haven't been active since the beginning or for a long time.
I only need five active affiliates as my direct down line and I prefer them to be self starting, moving on their own, like I am, not people I have to push to be active.