It’s part of our quarterly engagement strategy, every 4 months we send out a “recap” type email with a slightly different focus every time.
The last one we sent included specific analytics on their activity in the community.
Broadly speaking, we pitch it by restating the common goal of the community, and how their activity is valuable to the goal and what they can do next to move things forward.
We got a pretty decent open rate. It allowed us to refresh our membership (remove / add members).
For those that didn’t respond, we sent a follow-up email to those that didn’t open or respond to the CTA.
It’s a difficult nut to crack.