pmpro-show-all-directory-users.php

<?php
/*
Plugin Name: PMPro Directory Customization
Plugin URI: http://www.paidmembershipspro.com/wp/pmpro-customizations/
Description: Show all PMPro Users in directory (regardless of status).
Version: .1
Author: Thomas Sjolshagen @ Stranger Studios <thomas@eighty20results.com>
Author URI: http://www.strangerstudios.com
*/

if (!function_exists('my_ts_pmpro_member_directory_sql'))
{
	function my_ts_pmpro_member_directory_sql( $sql, $levels, $s, $pn, $limit, $start, $end, $order_by, $order )
	{
		$sql = preg_replace("/(mu.status\s*=\s*'active')/", "mu.status LIKE '%'", $sql);
		$sql = preg_replace("/(ORDER BY\s(\w*\.\w*)\s*(ASC|DESC))/", "GROUP BY u.ID ORDER BY $2 $3", $sql);
		$sql = preg_replace("/(LIMIT\s*\d{1,},\s*\d{1,})/", "$1", $sql);

		return $sql;
	}
}
add_filter('pmpro_member_directory_sql', 'my_ts_pmpro_member_directory_sql', 10, 9);

Don't limit the content of the user directory for PMPro to only users who're currently active members. Includes "everybody" who's ever been a member or has been assigned a membership level at some point.