Delete anonymus users mu-plugin not working?

Hello,

So i am “blessed” with the anonymous users created in wp_users and wp_usermeta (this particular WP setup is highly customized).
I found this but i don’t think the function is triggered at all

// Remove users and meta data.
function fix_wpsc_clear_customer_meta_andre() {
	echo "TEST wpsc clear function";
        wp_mail('[email protected]','WPSC delete users','function been called');
	exit();
	global $wpdb;
	require_once( ABSPATH . 'wp-admin/includes/user.php' );
	$purge_count = 200;
	$sql = "
		SELECT user_id
		FROM {$wpdb->usermeta}
		WHERE
		meta_key = '_wpsc_last_active'
		AND meta_value < UNIX_TIMESTAMP() - " . WPSC_CUSTOMER_DATA_EXPIRATION . "
		LIMIT {$purge_count}
	";
	// Do this in batches of 200 to avoid memory issues when there are too many
	// anonymous users.
	@set_time_limit( 0 ); // no time limit
	do {
		$ids = $wpdb->get_col( $sql );
		$included_ids = array();
		foreach ( $ids as $id ) {
			$included_ids[$id] = $id;
		}
		$in = implode(',', $included_ids);
		$wpdb->query("DELETE FROM $wpdb->users WHERE ID IN ($in)" );
		$wpdb->query("DELETE FROM $wpdb->usermeta WHERE user_id IN ($in)");
	} while ( count( $ids ) == $purge_count );
	// Update number of users.
        $tmp_total_users = count_users();
        /*echo 'test: '.$tmp_total_users;
        exit();*/
	update_option('user_count', $tmp_total_users['total_users'] );
}
function fix_reset_wpsc_cron_andre() {
	remove_action( 'wpsc_hourly_cron_task', '_wpsc_clear_customer_meta' );
	add_action( 'wpsc_hourly_cron_task', 'fix_wpsc_clear_customer_meta_andre' );
}

i add this test bit

function fix_wpsc_clear_customer_meta_andre() {
	echo "TEST wpsc clear function";
wp_mail('[email protected]','WPSC delete users','function been called');
	exit();

and in wp-config i have set WPSC_CUSTOMER_DATA_EXPIRATION to 1 minute
define( 'WPSC_CUSTOMER_DATA_EXPIRATION', 60 );

But i don’t receive an email, so how can i check if add_action wpsc_hourly_cron_task is valid?

https://ww.wp.xz.cn/plugins/wp-e-commerce/