Answer about private keys
Seems like you didnt get right what a fork is. There is no need to give us any private keys to get the coins.
All snapshots will be captured automatically and coins will be available after we launch the mainnet.
Indeed, after the mainnet launch, you will need the private key to control the coins (this is general blockchain feature). We will check the security and conduct an audit before the launch, the source code will be open for everyone. Also, before entering your private key, you can transfer all your Ethereum funds to another wallet. Anyway, there is no point to charge us in anything.
According to your logic, any fork project can be called a scam.