That's the default assumption for any site/sale that only shows prices in USD.
No. If there is a statement that they accept payment in bitcoins and they quote a price in bitcoins! If customers select the bitcoin payment option then they are offered a price in bitcoins. So, in case of a refund they must get back the same amount in bitcon they have originally paid.
-Product was paid for with BTC.
-BTC were not converted to fiat and keep in one wallet.
-Refunds for those who paid with BTC are now getting lesser BTC back.
-Somebody is doing the calculations.
-Who? and Why?
If I were to start some fictitious entity that sold pre-orders for some product, and accepted and amassed Bitcoin, with the hope of bitcoins to increase in value, this is the way I would do it. After a period of time, whether the price goes up or down, I fold. If it goes down, I'm out very little and time when I return all bitcoins. If it goes up, I return the dollar amount, thus pocketing the profit. In this case, it's averaging about a 20% return, on how many bitcoins? The CC charges will be handled separately or I wouldn't have accepted any. If I operate as a crock, not only do I get to keep the 20% profit, but I would also not pay back all the vendors and play catch-me-if-you-can.
Why would you accept CC payments if your intent was to "Game" the potential future value of BTC?
If you were to start? Your idea's are speculation and based on supposition.
Hindsight bias, also known as the knew-it-all-along effect or creeping determinism, is the inclination to see events that have already occurred as being more predictable than they were before they took place.