Found this dice site with a huge faucet: www.crypto-games.net
You can get free bitcoins from the faucet (and even other crypto currencies). The maximum faucet size is actually 20500 satoshi which you can claim every 3 min. Your faucet size is determined by your level which increases through your waggered BTC, referred players, referral comissioin, messages you wrote in the chat and even the number of days your account exists.
For more details click on the 'faucet' tab in any gambling mode and then click on 'your level'.
