We can even see negative house edge websites !
These are the faucet. I'm thinking in particular of
http://www.freebitco.inTheir business model relies on advertising, so the games are just giving BTC away.
It's very hard to get some decent amount of money. You can win more on a dice site.
If some organization find a right balance between income, profits and expenses, we can have very interesting free games.

oh that is one bad example for a negative house edge
freebitcoin is a faucet+gambling site,their dice game has one of the highest HE out of all the dice sites
it is 5% and it is there to cover the faucet expenses
also they do not have advertisment as of lately as in banner or text ads
don't think you visted their site lately
in any case, 0% house edge is sustainable in some cases (PVP,for example) but I don't trust websites like that
Yes this is indeed true, I believe there are no site that offer this huge on their house edge. Only freebitco.in that can offer this huge and top of that, they also give very huge amount of lottery every single week so I think it is worth for them. I ever ask one dice admin why they can't provide such a huge lottery on their site and what do they say? If you want me to increase the house edge then I will give you even more lotttery prizes
And btw let me clear this thing, they purely do not get income from banners or any ads, only from their hi-lo games which is the highest among all