Bitcointalk sends you an email when you receive a PM (private message from another user).
If you dont have a message from Fourge, the message could have been deleted due to spam or scam report.
The message contains a fake ethereum foundation address (official ethereum website is
https://www.ethereum.org/) The fake URL also uses a free domian name ".cf" and the name is broken into subdomains - the base domain name is mfoundation.cf. If the real ethereum foundation would make a giveaway, it would be visible in the real website ethereum.org.
The link is a classic scam:
To participate, just send 0.2 ETH to the address below and get 2 to 20 ETH back
This website simply takes victims 0.2 ETH payment and never sends the promised 2-20 ETH.
To participate in a legit giveaway, you never need to send money first or enter private keys. At most you would need to enter your crypto address (not private key), email address or bitcointalk username, but you will never be asked to pay.
Advice: If you receive an unsolicited PM with a link to a "giveaway" or "airdrop", check first via Bitcointalk if the giveaway is legit and make sure that the URL is the official website URL (for ethereum: ethereum.org). Never pay to enter a giveaway and never enter your private key or mnemonic because both are scams to steal your crypto. You can also check
https://etherscamdb.info/scams for information about scams that target ethereum.
[Edit] The phishing domain is listed as scam here:
https://etherscamdb.info/domain/ethereu.mfoundation.cf/ and the phishing website appears to be offline.