Notably Recent Expoers
This is based purely on attendance, not on activities, surveying or usefulness of any kind. But as Woody Allen said: "90% of success is just turning up". This is mostly people who have been within the past three years, with an additional bias for number of attendances since 1976. The metric is just a geometric "recency" (1/2 for attending last year, 1/3 for the year before, etc., added up.) The display cuttoff is 1/3 so if you came just once, three years ago, you are on the list.