If you must have a problem – this is one problem you WANT!
Lots of activity on your Membership Site can result in a very busy forum, which of course, is good – good – good 🙂
It means that people are using the forum and interacting. More visits to your forum will mean more interaction from the guests and registered members which can result in more admin time needed to manage everything.
So how do you deal with this growing “problem”?