Because these people are Rust partisans, who are hiding behind generalized language and confusing "About" pages to push their partisanship under the guise of benevolence, since shaming everyone who disagreed with them backfired.

They have more information on their website about how to give them money than they do about who they actually are. This makes it easier to route cash to rewrite-it-in-Rust efforts without having to defend these decisions.