In the days when web servers were still fairly new, I was involved in trying to set up a web-based interface to something which had a database behind it. The licencing for that got us into a legal debate that lasted over 18 months trying to define who was a user. The database provider wanted to consider every "natural user" of the system as a separate person, so each person would need separate licence costing a few hundred points each. Given anyone in the world could potentially use it, that would have been a tidy sum!