I thought there were casinos with 0% house edge around here, correct me if im wrong
AFAIK there are at least 2 games with 0% house edge, the PvP on Primedice and the PvP raffle game on Peerbet. The downside is that there are not many players and it is hard for you to find a good match.
A dice with 0% house edge would still make profit so i dont know why no one made it, it would atract a lot of players
I don't quite get it. By definition, "0% house edge" means the game has a expected value of zero to both the players and the house.
So how would a 0% house edge game bring profit to the house? 
It doesn't in itself.
But the house hopes players will play other house games that do have a house edge.
It's a marketing strategy.
Not really?? With a 0% house edge casinos would still win, why? Easy at the moment you start using a strategy, it doesnt matter you name it, martingale you would still lose using martingale, yes the odds are a bit better per bet now but you will still see 20 lose streaks or more, the 0 house edge only affects players if you bet static, you bet 10k satoshis every bet, yes in the long term you would have a 0 profit but no one is gonna do that, right? So as i said before casinos would still win
Well it looks like you are assuming people will keep on playing until they are broke.
With that assumption, I guess you are right. A player need to have extremely good luck to wipe out the house bankroll before losing all his money, when the house has hundreds or thousands times more bitcoin.