I guess having more information on post bit on topics will help motivate members post more. I mean display post count, no. of likes received, date joined etc.
I don't know if this could motivate a member to post more...
I'm also interested to show the number of likes (given/received). I searched yesterday in the admin panel but could not find it (and I'm almost sure I saw it, but maybe I'm confusing)
The total likes given / received for a member is displayed in their profile summary.