How to earn from this website i don't know.
It shows me (ctrl + click) to open ad link in a new tab
Also the referral link is not allowed in forum please edit it.
you will see the count down timer at the top..
when the counter is 0, you click next and after you are verified as human, you will receive Bitcoin.
and the link is not referral, it's to track where registered users are coming from.. (source reference id)