Having been away stalking for a week with clients, I have just seen this on the site. I think JAYB has hit the nail on the head so to speak. Also much depends on the quality of the exchange between people, I can see some issues there if it does not live up to the expectations of people arriving at a place and its not as described.
Further more all those professional stalkers would not be in a position to give or swap too much as it is giving away business, and we have bills to pay the same as everyone else.
I also think we do quite well already with the membership on here being very generous with helping each other out. Due to the generosity of another member there is a days stalking up for grabs at the moment with me.