The fairspin casino already has its own token called tfs but I only don't know if it's based on dao or not. I heard dao is much better as it's more decentralized since investors can make a voting while on normal tokens, it was the team that makes most of the plan. So far the crypto casinos that I know that has a dao token is owlgames.
Using their own tokens from their promotions can save them much money than using standard coins like btc while there are some that don't like to use their own tokens because they are afraid that participants can just dump their tokens once they received it, that is the reason why they are using other cryptos.
I also share your opinion, although sometimes the casinos do not want to use the native tokens for these practices, it is necessary to emphasize that they cannot cover the sun with a finger, they must do it, just look at the case of Betfury, they launched their token and they are in exchange, and sometimes when the BTC goes up in price, the token usually gives a great improvement, the most remarkable thing here is that it is already in the market, they know it and it applies that their token is being used very well by their players, hodlers and everyone, in fact their current sign campaign, the participants when they pay them have the right to choose between BTC and BFG tokens, to do that movement is that things with the token are going excellent.
TFS token is also tradable. You can find it on Uniswap and Pancakeswap. Here you can find more info
https://tfstoken.com/And we have loyalty program based on the token
TFS is an ERC20/BEP20 token.
Play To Earn program. TFS tokens will be credited to all users as a reward for placing bets, both winning and losing.
Hold To Earn program. TFS tokens will be credited to all users as a reward for freezing tokens for a certain period.
The emission of tokens is regulated by smart contracts that will generate a certain amount of TFS tokens based on the current exchange price and the daily income of the platform.
TFS is a deflationary token with a limited supply. It offers a limited total supply of tokens and a regular monthly buyback in which a certain percentage of tokens is withdrawn from circulation.
And we have launched airdrop presently. We grant 200 TFS for the registration on Fairspin.
. You can send me in private your email\account name when the deposit is done and I will fill your account with 200 TFS 
