Once a month I usually check for such clients
These are usually the result of all their products / services being processed from Suspended to Terminated or Expired
Within the Client list they should then show as 0(X) in the Services column
These clients are then updated as Closed
Inactive clients are those that have signed up only (not purchased anything)
As above, look for 0(0) in the Services column
I removed the register link, so this no longer happens, I converted these clients to Closed
m8internet.com from Manage My Hosting
Using WHMCS since 11 December 2011, running v5.0.3 since 27 April 2012