We take the order's final price, order by order, exactly as it ended up: including shipping, offers, promotions, discount coupons and free shipping.
The price is never configured in Escalafy; it always comes from the order. The only thing you can configure is the cost.
As a result, if an order was paid with a 100% coupon, it will show $0 revenue in Escalafy. That's expected behavior.