These types of addresses are useful for publishing static directions for receiving payment (what they call a “meta-address”) that doesn’t then reveal every tra

These types of addresses are useful for publishing static directions for receiving payment (what they call a “meta-address”) that doesn’t then reveal every transaction that has been sent to it. It is orthogonal to / does not impact sender privacy whatsoever, and likewise doesn’t help the receiver maintain privacy when they try to spend those coins if they get intermingled with other coins that could be tracked.