I think that the 33.3% is a generous win ratio and I think many players may be fascinated by such a high chance percentage in a lottery game.While you may start out small as you say but based on the participation of people it may become a hit and it may turn into a big lottery.Of course you will have to adapt to changes if this happen.
Yes you are true the winning percentage of 33.3% will obviously attract the people but our minimum bet would be 0.001 BTC which is nearly $ 10 and the minimum winning odds of 3.