This Member of the Month has been a part of our organization for the past 8 years.
They have accomplished X, Y, and Z in their career and are really good at what they do. They have spoken at our events, volunteered for opportunities from sitting on the board to helping first time attendees at our conference, and are consistently involved in our mentoring program.
This MOTM could have a ribbon on their profile for a month, or a badge that shows up with their posts. This gamification shows your users that you recognize the effort they are putting in and you want to thank them for it, which will encourage further engagement.