DOB Lotto is a lottery site based on your date of birth. You register an account with your chosen date of birth and if your date of birth is chosen in the daily draw then you win £50.
There is also a monthly draw which is based on the number of referrals you send to the site to create their own account. Each new referral earns you an entry into the prize draw to win £50.
The money is funded through the ads you'll see on the site.
To join DOB Lotto sign through my referral link here: http://doblotto.com/r/b6f8dc