Dear Inri101081, if you want to participate in this contest, then, you have to advertise Bucks24/7 in other PTC/GPT/Traffic Exchange sites to send traffic using your referral link (you can find your referral link on Promotion Tools page).
You will find here the names of the sites where you can advertise your referral link: Cheap traffic to gain direct referrals
There are so many other sites too, where you can promote Bucks24/7. You have to find those sites by yourself.
