I'm going to use easy numbers here because math is hard...
If the Circuit needs $20k to continue to operate as it has in the past, split over 20 events that's $1k per event in contributions.
That's easy on the large events, and really tough on the small events. For Pinburgh that works out to $1.25 per player. For a smaller event (60 players), that works out to about $17 per player.
We felt that a per player structure for most events would be the easiest way to get there and doable for just about every tournament. The idea being that as new events are put on the circuit, and attendance improves, they begin to contribute more. Breaking it down to the smaller amount, per player, helps contribute to the overall goals.
There is an added bonus for larger events in that we will send out more prizes based the the projected size of the events.