A: Luckyb.it
Q: Why?
A: Because they have a lotto bot in the chat who give free BTC to users, and is not like dice, i mean, you cant lose all in one single bet, users always get something back.
is it like faucet in other gambling websites which pay 200 satoshi to you in every claim?
Lotto Prizes for now is range between 0.0005 - 0.005 ( in Happy Hour chat-lotto send prize x3 or more than normal lotto, the biggest lotto in HH is 1.5 btc )
Chat-lotto will pick chatters randomly in chat to receive the prizes.
200 sats ? No, even LuckyBit Faucet give prizes more than that
![Tongue](https://bitcointalk.org/Smileys/default/tongue.gif)