function bp_members_format_activity_action_new_member( $action, $activity ) {
	$userlink = bp_core_get_userlink( $activity->user_id );
	$action   = sprintf( esc_html__( '%s became a registered member', 'buddypress' ), $userlink );

	// Legacy filter - pass $user_id instead of $activity.
	if ( has_filter( 'bp_core_activity_registered_member_action' ) ) {
		$action = apply_filters( 'bp_core_activity_registered_member_action', $action, $activity->user_id );
	}

	/**
	 * Filters the formatted 'new member' activity actions.
	 *
	 * @since 2.2.0
	 *
	 * @param string $action   Static activity action.
	 * @param object $activity Activity object.
	 */
	return apply_filters( 'bp_members_format_activity_action_new_member', $action, $activity );
}