Steam, as with most institutions that "accept" Bitcoin, never actually handles Bitcoin themselves. They use a financial services provider who accepts Bitcoin a

Steam, as with most institutions that "accept" Bitcoin, never actually handles Bitcoin themselves. They use a financial services provider who accepts Bitcoin and gives them USD and takes a cut of the transaction for themselves. Dealing with that short-term volatility is one of the things that fee pays for. Is it ridiculous that the price can fluctuate enough in 60 minutes to significantly affect a transaction? Obviously.