About once a month, one email: the campgrounds added to the map, the closures the agencies have posted, and what the site can do now. Nothing else, and every email has an unsubscribe link.
Signing up sends you one confirmation email; you are on the list only once you click its link. The address is kept for this list and nothing else: it is never sold or shared, and it is not the same as a sign-in account — signing in to save campgrounds does not put you on the list, and signing up here does not make an account. The confirmation and the updates are delivered by Resend, which sees the address in order to send them.
To stop, use the unsubscribe link in any email. It takes effect at once and removes the address. More in the privacy statement.