Some people have indicated that they might want to restrict their donation to just one of GWWC, 80K or EAA. But earmarking often doesn't work in the presence of unrestricted funding

I've been helping CEA work out how to handle earmarking; naturally we're aware of the fungibility problem, and there is in fact a whole page on the GWWC website about it. So I can promise that we're being careful to respect the wishes of donors who wish to earmark, while being upfront about any fungibility issues with them.