ironic how just a few stories down is an article about how approx 50% of steam payments with bitcoin (when they accepted it) were fraudulent... everyone wanting a quick buck without doing the work
That was Steam's fault for accepting unconfirmed transactions.
You can make a fake Bitcoin transaction but you can make 2 transactions using the same funds but going to different addresses. Only one of those will end up on the Blockchain. If steam waited for the transaction to appear on the Blockchain instead of just the mempool, they wouldn't have had the problem.
