ok so minimum payout is $50 this is really a big amount. I think think this is just wastage of time. But I think if you have some space then there is no harm on posting the banner on it. I am trying and also posted and displaying banner. luckily if some one will get then good for me.
Good to see you have put the banner of hostgator, and I wish best of luck for you. Even two or three paid referrals will help you to reach the minimum payout. I suggest you to promote the banner in such forums or place where many new webmasters are there. You will get hardly any referrals from Paid to Post forum.