The PelleFan map shows the general geographical area of a member and serves many purposes.
Some might use it for furthering social contacts. Some might use it for making contacts when purchasing large quantities of pellets and dividing up a particular order. Etc. etc.
Certainly some might not participate in having their pin put on a map - feeling that their privacy might be invaded a bit. In my situation, I have not found that to be an issue at all.
Link to Map...
PelletFan Map