Bitpay has been around since 2011. Valve are big enough to create their own bitpay in house if they wanted to. Basically, they are followers not the leaders they used to be in tech .... is what it comes down to. I agree Valve will 'accept' bitcoin soon, because it is safe, microsoft, dell, etc, etc but I highly doubt they'll be doing anything innovative with it inside their games, in-game currencies, user-wallets, etc ... probably just dump it back on the xchanges for the commie fiat.
I agree, but Bitpay didn't have the infrastructure/reputation they do now. Valve will implement BTC, it's only a matter of time, maybe when they release Half-Life 3
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