Earn free bitcoin

This is a social experiment. The site promises to pay 10$ worth of Bitcoin to your Coinbase address.

TRY IT AT YOUR OWN RISK!

EDIT1: 12 hours now and no payment received. 99 percent sure that this is a scam. I wonder what their deal is - they asked for email and a bitcoin address. What can they do with these 2 pieces of info? Any suggestions?

EDIT2: I am 99.999% sure now that this is a scam. They are actually trying to get people to signup on Coinbase using their reference link (when you create a wallet, you use their reference link).