[Memebership] - Bulk set "Users without Membership can subscribe" in "Updrade Path" to true or false.

ms-bulk-update-denied.php

<?php
/**
* Plugin Name: [Membership] - Change update_denied param
* Plugin URI: https://premium.wpmudev.org/
* Description: [Memebership] - Bulk set "Users without Membership can subscribe" in "Updrade Path" to true or false.
* Author: Panos Lyrakis @ WPMUDEV
* Author URI: https://premium.wpmudev.org/
* License: GPLv2 or later
*/

// Use in a mu-plugin
// Visit yoursite.com/wp-admin/admin.php?page=membership2-settings&ms_bulk_update_upgrade_path_to=true - OR yes OR 1
// to set to true (and set to Deny)
// This will affect ALL memberships you have. We strongly recommend to first test in a staging iste and keep a backup before you use it.

add_action( 'load-membership-2_page_membership2-settings', function(){

	if ( ! isset( $_GET['ms_bulk_update_upgrade_path_to'] ) ){
		return;
	}

	$value = in_array( $_GET['ms_bulk_update_upgrade_path_to'], array( 'yes', 'true', 1 ) ) ? true : false;	
	$all_memberships = MS_Model_Membership::get_memberships();
 
 	foreach ( $all_memberships as $membership ) {
    	if ( $membership->is_base ) { continue; }

    	$_membership = MS_Factory::load(
			'__MS_Model_Membership',
			$membership->id
		);

    	$_membership->update_denied['guest'] = $value;
    	$_membership->save();

	}

} );

add_action( 'plugins_loaded', function(){
	class __MS_Model_Membership extends MS_Model_Membership {
		public $update_denied = array();
	}
} );