By the way, why does the site ask to install third party software like METAMASK?
MetaMask extension acts as an intermediary between the website and the Ethereum blockchain. It is also necessary for the safe storage of your private keys without transferring them to the site.
MetaMask is an extension for accessing Ethereum enabled distributed applications, or "Dapps" in your normal Chrome browser!
MetaMask also lets the user create and manage their own identities, so when a Dapp wants to perform a transaction and write to the blockchain, the user gets a secure interface to review the transaction, before approving or rejecting it.
https://chrome.google.com/webstore/detail/metamask/nkbihfbeogaeaoehlefnkodbefgpgknn