Showing appreciation is a minor detail (sorry to take your wording so literally; I'm just using it to make a point). This is essential work for everyone and for our democracy. Donating to and supporting the EFF (or similar organizations, if you don't happen to agree with the EFF) is a responsibility; it's doing (part of) your share.
The greatest problem in our (and every) democracy is not those who actively oppose progress, but the great majority who sit around and do nothing.
(The upside to that is, if you do get off your ass, then you have greatly disproportionate power over your community and nation. An organized, active minority can be very powerful -- look at the Tea Party, which I think only 10% of American support but which, by being very active and by being almost 50% of GOP primary voters, has great influence over the entire nation.)