Award all users on WooCommerce purchase

add_action( 'woocommerce_payment_complete', 'mycred_pro_give_points_to_all_woo', 10, 3 );
function mycred_pro_give_points_to_all_woo( $order_id ) {

    // Make sure myCRED is installed
    if ( ! function_exists( 'mycred' ) ) return;

    global $wpdb;

    // Load myCRED
    $mycred = mycred();

    // Get all users that have a balance
    $all_users = $wpdb->get_col( $wpdb->prepare( "
        SELECT users.ID
        FROM {$wpdb->users} users
        INNER JOIN {$wpdb->usermeta} balance
            ON ( users.ID = balance.user_id )
        WHERE balance.meta_key = %s
        AND balance.meta_value != '';", $ctype ) );

    // Loop
    if ( $all_users ) {
        foreach ( $all_users as $user_id ) {

            // Make sure user is not excluded
            if ( $mycred->exclude_user( $user_id ) ) continue;

            // Award
            $mycred->add_creds(
                'product_purchase',
                $user_id,
                10,
                '%plural% for store purchase',
                $order_id,
                array( 'ref_type' => 'post' )
            );

        }
    }

}