A gambling website is not cheap,you have to understand that..
You are fully right about this, there are no gambling websites with an 0 percent house edge because they than simply would never make profit or money to build up their empire.
Yep, it is true when we talk about casinos. 0% house edge means that casino is working without earnings (for free). Betting sites can work on a bit different principles, and that also is gambling They can earn from differences of odds (kind of arbitrage) and in this way they can work with 0% house edge.
well this part is not right at all.
you know that casinos are earning from the money that people are losing in their sites. it is not like an exchange service that takes a percentage out of anything that you do.
so whether house edge is 0% or 1% or in between, the house is still earning money because people will lose, the only difference is that the odds are even between the house and the player.