hm I think everyone has different ways they handle their comments, but there are also lots of people, unfortunately due to so many CTs and their requiements these days, that just drop their layouts and run. They never really return many comments at all.
Personally, I try to be sure I hit anyone that has used any of my product, any one that has participated in my chats, and I try to go through the "today's gallery posting" as often as I can. I don't always go through comments on my pages to make comments back - but I do as often as I can.
Not quite sure WHERE we could put some posting reminders..maybe a general idea of ways to spread the love kind of thing could help - but I don't know where it would best be put. Any ideas?