Yes, but I think an individual spending 1-2h/yr running a tor node or remailer is a far greater impact than donating a marginal $25-50 to EFF. An additional node both makes the network stronger and sends a message/educates the operator on privacy issues.
I'm not convinced a marginal dollar donated to the EFF does that much right now -- EFF is great, but fairly well funded.
(Disclosure: I work for EFF)
[1] http://www.onion-router.net/History.html (2004) [2] https://www.eff.org/https-everywhere [3] https://supporters.eff.org/donate