A plugin to disable cron-initialized imports on a BigCommerce for WordPress site. Drop this file in /wp-content/mu-plugins, or add the snippet to your theme's functions.php.

disable-bigcommerce-cron-import.php

<?php

/**
 * Removes the cron trigger for a BigCommerce import. It is still possible to
 * run an import manually by clicking the "Sync Products" button in the admin,
 * or by running the import from the command line.
 */
add_action( 'bigcommerce/init', function( $plugin ) {
	remove_action( 'bigcommerce_start_import', $plugin->import->cron_start, 10 );
}, 10, 1 );