ER-Diagram: Ternary Relationship - How to read properly?

Question

Im not quite sure how to read ternary relationships within a ER-Diagram. Lets say this is the ternary relationship that is given. What can I interpret out of that?

Answer 1

Most likely it's a hierarchy and it's means there are many account and many users. It's also means account is smaller or equal to user. It means more users to account. Most likely I use ternary data structure with tries.