WC Vendors - One commission rate for regular products, one for downloadable products

functions.php

/* WC Vendors - 40% commission on regular products, 50% commission on downloadable products */
add_filter( 'wcv_commission_rate', 'my_wcv_commission_rate', 10, 4 );
function my_wcv_commission_rate( $commission, $product_id, $product_price, $order ) {

        $downloadable = get_post_meta ($product_id, '_downloadable', true); // Check if product is a download
        if ( $downloadable == "yes" ) {
                $commission             = $product_price * .50;
                $commission             = round( $commission, 2 );
                return $commission;
        } else {
                $commission             = $product_price * .40;
                $commission             = round( $commission, 2 );
                return $commission;
        }
}