Is there any use case for this other than to scam people? No.
Is this against the rules? Probably not.
What your mean?
The only reason why anyone would want to buy a site template literally modeled after btc-e is to use it for phishing. For example, send scam emails telling a user to reset his password but giving a link to btc--e.com maybe instead of the legit btc-e.com. If your script is that good like you claimed, there is no need to imitate btce to such an extent.
vô
So everyone writing here and showing interest should be put on a scam list.