IIRC Newegg is using Bitpay, which costs ~1% and settles to USD daily. It also means no refunds allowed (even in USD) to the customer using it, only store credit.
Which is an entirely pointless way to transact commerce for 99% of the population. I get my paycheck in USD and then buy goods and services with it. If it converts to BTC and then BTC back to USD then whats the point? It's just paying with a credit card with extra steps.