yes and? you get the data of only one tarsnap user.
The comment you were responding to was from the tarsnap creator where he was saying he doesn't have access to those keys so cannot be coerced to give them (and thus has no way to decrypt the data of all the clients).
The comment you were responding to was from the tarsnap creator where he was saying he doesn't have access to those keys so cannot be coerced to give them (and thus has no way to decrypt the data of all the clients).