The EtherZero fork occurred at block height 4936270 has never been clear.
Firstly, the website has been flagged as pishing from Metamask, here the issue on GitHub.
A lot of people accused EtherZero of scam, though we don't have any proof of it.
BUT
MyEtherWallet published a tweet recommending "NOT INSTALLING NOR USING ANYTHING RELATED TO ETHZERO AS IT PUTS YOUR SYSTEM & ETH AT RISK".
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