Drawing attention has zero impact no matter how often or how rarely you do it. Unless the Rust team has privileged knowledge that they're releasing, or are directly acting in the interests of known individual contributors, donating any amount of money to a cause is worth far more than tens of thousands of people becoming informed that the world is slightly worse than it was yesterday.

Even if drawing attention was worth anything, I think you are assuming the wrong frequency - the Rust technical release notes may contain few calls to political action, but everyone reading them spends enough time online to be constantly bombarded with them.