After watching wspr for some time now, it seems to be developing its own kind of intelligence between stations. I wonder that the community of wspr is a sort of "hive" mind that is fully aware of the other stations, and is even connected with the RF physics of Earth to promote the communication channels that it wants.
Because the human owners of the stations are largely out of the picture, other than the rote setting up of the equipment, it is left to the emf physics to determine who is heard by whom, and then it begins a sort of machine language between the stations.