I think there are still some gambling places that still can't be fair because usually the fair possibility posts are only on or in front of the gambling site's website but sometimes they insert an encryption script that makes enemies often lose.
Yeah of course, gambling for others is business even some uses gamblingn platform to scam. If you can visit the reputation section then you can see few gambling platform with bad reputation.
There are gambling platform that welcome you with hug bonus as sign in bonus in joining their platform. Before yo can withdraw you are ask to play the game and of course win that game. However, when you will going to withdraw the bonus and the winning profits of the game the dev will going to ask a processing fee like some sort of btc to deposit before one can withdraw which shows that this activity is clearly a scam activity. Why would ask for a certain deposit before one can withdraw? why not deduct it to tye funds to be withdrawn?