We are also waiting for an official announcement.The devs from BTG told us that they've got access to the hosting server of the website and are investigating.
The developer of the website said he is investigating this too but the community acuses him for now until further proof.
The site is 1000% scam. You (all) should learn once at for all - never put your private keys on unknowns and suspicious sites.
My guess is that somebody hacked BTG site and put the phishing link there. It's pointless to steal some merely 40-50BTC and ruin a billions dollar cap project.
I do agree with this guy. Many hackers nowadays scamming in ICOs as well. Won't be surprised if BTG site was hacked.