Re: 🎲EarnBet.io - $50 FREE Bitcoin Sign Up Bonus Right Now! 🎲Provably Fair 🎲BTC ₿
I guess without a deposit this is not free but a $ 50 deposit bonus 
Unfortunately this is the very common on most casinos. You either get a free start money to check out the website, but then you have a lot of limitions on the money. You won't be able to cash it out, its meant to be played on the site. How could any company survive while giving 50$ bucks to every new customer.
I think deposit bonuses are a good way for first timers on a website to get to know the games and don't lose all your money at the beginning.
I agree with you that if there is a chance of a deposit bonus at the beginning of the game then there is not much loss if you lose money because we are able to cover it through bonuses and if the amount of loss is high, we will deposit immediately. That's why these casinos are so great and we can make more profit with less investment.