I can't even find if they are making this a tax rebatable donation because it's impossible to find information on jstor. Any search with "jstor" in it will include results about papers (which i won't be able to read more than the title/abstract) from jstor and dozen of other sites, because search engines assume I mean "academic papers" with i type "jstor", even in quotes.
And jstor being opaque as it is, it is the perfect recipe for zero discoverability.