Guys, you pay for a product listed in USD.
Its clear that the nominal BTC value changes - most of these Crypto payment providers even transform the Cryptos directly into the dollar amount at the time of payment.
That's why I asked if they provided a reason for the subtraction. If the USD amount was the same before and after then yes, what you say makes sense. **But** doesn't that go against what we're trying to do here? Use Bitcoin, or any other coin for that matter, as a currency? Playing games around exchange rates is just wrong.