I had thought about that. This was my take on it.
For a cache to be SWAG usually it is a micro. While i have nothing against micros and like them when cleverly placed, i kind of think of cache placement as children.
Most anyone can make a baby, but not everyone should. Or however it goes. Most anyone can hide a cache, but everyone cant make it a decent hide. I didn't quite say this right, but you get where i am going with it.
For every crappy cache placed that is just one more area which voids out a 219,000 square feet of possible cache placement area. (If my math is correct.) How many times have your heard that someone found a perfect spot but there was another cache close by so the idea got abandoned?
I like it when people think about the hides and tailor them to the situation. I dislike when people are driving in a car and say look a sign/guardrail where we can stick a key holder. When people have to tailor the containers and ideas for each situation- then its hard to anticipate what type of container to leave for SWAG.
Maybe i think too much.
Actually I believe it would be more like 1,115,136 sq ft as it would be 528 ft in all directions from the cache which would account for a 1056 ft x 1056 ft area. But that being said they found the place first and hid something there, which may be the only reason a cacher ever visited the area.