Libraries are offered far more material than they can cope with. For any donation, a library has to ask "what is it going to cost us to accept this?" - cataloguing, shelving and conservation cost money. Adding a nontrivial complication with rights management could well tip the balance to rejection.

It would be easier if you could simply find an institution whose existing policies were acceptable to you; that way it won't incur any extra costs for them in doing something out of their usual routine. I assume the EFDSS has thought this through.

I am thinking of donating some of my stuff to a library - what I am intending to do is as far as possible to pre-catalogue it using their own standards. That way, they can check what they're getting more easily, and it'll be less effort to process.