Yes correct. There are many websites that even offered negative house edge in your favor. And players still ended up losing, they had to remove it when they added API because people coded bots and they had to remove the negative house edge then due to combat cheating.
I think they give a tagline that they choose house edge is zero or negative I think it was just to attract the players to want play on their site, because if the house edge on their site real zero certainly their gambling site have lost because players would always win right ? so I think there is no stupid gambling sites that actually give a zero on the edge of their gambling sites, come on dude gambling will definitely give the risk of losing