My idea would be to charge for the member swaps twice a year, you could set the amount to whatever it takes to recoup the loss, probably would be less than the cost at the open swap. Of course they wouldn’t be called member swaps, just swaps at that point. People would be welcomed and encouraged to show up as non-members and sign up for membership at the door.
It is theoretically possible that we educate people and recruit new members at the open swaps, but I am doubtful it is significant on both counts. I actually think we would recruit more members if you had to be a member to attend swaps. For the education component (which I completely agree is important) I must be missing it but I don’t see how the open swap vs member swap does that.
Think about how a person learns about our open swap- they have heard about it somehow, think it is valuable, and look for/find the announcement on our website. They probably have been on our website lots of times to look up info they are googling. Then they actively decide not to be a member and come to the swap for almost the same cost.