A casino minting their own token basically allows them to print their own money.
We need to roll the issue back to instinct of altcoin developers and founders. Create their altcoins from the air, especially true if their coins are Proof of Stake, not Proof of Work, and are free to build any tokenomics they want to use.
Now they can make as many bonuses as they like, and not run out of money in the process because it will all be tethered on their own token platform, which only they control.
When you consider the fact that most players burn through their bonuses, it's basically free money for BC.game

Building up tokenomics with part of it for marketing and distribution to community in general and the platform users in particular is better than many altcoin projects that scam their supporters, bounty hunters and run away without fair distribution.
It's more attractive than free spins without a platform's native currency, token.
A pioneer of this trend can be Binance in 2017 and many exchanges followed Binance to do the same. I don't know what is a first gambling platform launches their native currency on blockchain, honestly.