BTW, one interpretation of Fred Hunt's comment as quoted here is that some part of the system is contractually licensed to a limit and that the limit is too low to support the next batch of new users for the system. That limit may related to the number of total/active/concurrent users of the system or some other more loosely related quantity.
Commercial software or components within are often sold on the basis of some licensed limit. This is often lower than the hardware resources could support. Regular Pprune users will be familiar with busy periods were some users are denied access to the messageboard to preserve access for others!