We can say, that the promotional use of the interface is so called the 0th way of using the EDUBOT interface. Promotinal, because we can use/ view the interface without registering.
However, many applications of the interface cannot be used at this time.
As an unregistered user, it is possible to use the interface only if an already registered user sends a link pointing to a route to the unregistered user. This form of use of the interface is really only suitable for a superficial assessment of the structure of the EDUBOT interface and, saving unnecessary registration, we can test the interface without investing much time and energy. In this case, the performance on the route and other data are not stored by the interface.