This is a quote from the book "On Zero Confirmation Transactions" by Chris Pacia
...n zero confirmation transactions’ and the code was removed.

So basically a patch that could have prevented people from fraud was removed. And what’s rich is that some of the sam
e people who blocked the double spend relaying cite the above attack as a reason why no one should use zero confirmation transactions. Nevertheless, companies were able to accomplish the same th ing by just maintaining a large number of network connections, which is more of a burden on the network than double spend relaying would have been.

Now you will often hear straw man...
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