Who brought each guest

A guest who comes in without buying showed up in the system as “external”, and that was the end of the information. Nobody could answer the question that matters: of everyone who got in free on Saturday, who brought them?

Now that check-in is attributed to the person who invited them. The guest list stops being a cost line with nothing on the other side and becomes something comparable: how many people each creator moves, and what happens to those people afterwards.

What it does not do yet is tell you whether those people came back paying. That needs the purchase and the person tied together over time, and it is the next piece.