This chat server is pretty simple. It is so simple that it is lacking some very basic features such as an identification of who sent each message or handling the case where a client disconnects.
While the both files are very simple, finding them solved another puzzle that troubled many web administrators lately as attacks such as those I describe are becoming increasingly common.
It basically lists the tasks it calls "human intelligence tasks" i.e the tasks that require human intelligence and cannot be easily accomplished by a computer (or a software).
With the improvement of the living standards, many people are no longer interested in the simple life style and some of them even feel ashamed to be thrifty.