btw, the organizers of City Spree
had it that the points gotten when finding a control varied according to the order of when it was found. So, for the sake of an example, control was worth 20 points to the first finder, 19 points to the 2nd finder, 18 to the 3rd... and 1 for the 20th and later finders. They had participants use a portable cellular phone to text a code that was on the control, and at the end they used the timestamp of the text (SMS) message and order of receipt to tabulate a participant's overall score.
If using SI cards and related software, can something like this (variable points based on order of find) be programmed ?
Came to mind when the comment by Jon, as I remember in that event, some folks that were slower, opted to go to the farthest controls first, so to claim "first to find" in some of them and thus get the higher points.