>> If you really don't care what you get in return, then you can just 'approve' all of the incoming trade requests without really looking at them much OR if you want to simply donate seeds to people, you could click on 'counter-offer' to the requests and delete the item they are offering you so that you are giving them something for nothing (a 'donation').
That would make it possible for me to join such a swap, but mostly I would prefer to just give a bunch and expect to get a bunch.
Hmm, maybe it is more of an issue for swaps with no previously-established history. For example, I can join Ella's Piggy Swap without even looking at the signup list beucase I know I'll find as many as I want of most things I might want.
In a much smaller swap, your idea of one-for-one trades would address the concern that I might find many things I wanted. However, most or all of my seeds are common, so I';m mainly risking the postage (at least $10, probably $12). For that, I hope to get many common pkts, more than would easily be negotiated if I have to find something I want from each person who wants anything from me.
But I bet many ATP members are on the opposite end of the spectrum: common seeds don;t interest them, but finding that one rare thing they've been looking for for years would be worth negotiation and lengthy searching and postage.
And they might not want to let go of the three seeds they ever got from that painstaking cross unless they get back something of collector value.