The team will have to do further research whether there is a lot of interest from some gamblers or only based on a few people and this will certainly take a long time to implement if this casino NFT wants to be a part of it.
Still, the most common feature used in gambling is this VIP level, more people are liked in the casino, even every casino has this feature.
However, there is also a rollbit casino model with NFT that works well, even if there is a marketplace.
By doing research, the casino can determine how much interest the users have and whether the decision will be right to use. In addition, if that decision were to be made, the casino would need more time to prepare it before launching to the public or giving notice to its users.
Maybe for a trial, the casino could give it to their VIP members to get a VIP member's rating for good advice for them.
IIRC rollbit has this kind of NFT but in a form of Rollbot but the article shared on the link was NFT for the casino built on metaverse. Meaning the casino is running on blockchain which is easy them to implement NFT with benefits to its user unlike centralized casino like blackjack.fun. I think NFT idea is not easy to implement on our casino and as you said already, It really need to have proper research and devs to work on that particular area.
Maybe they can see what NFT is already used in some casinos as a comparison for their casino sites so they can come up with creative ideas to make NFT too. That's why researchers and developers need to pay attention to where the market trend is going so that they or the casino can always keep up with market developments.
The benefit could be different monthly lotteries to win bonuses for NFT owners. Or there could be a monthly raffle for the type of trait a card has that can be given higher cashbacks, or given free casino currency to use in different games. There can also be "combination raffles", with two or more cards are needed to unlock a bonus.
Giving a monthly lottery can be one of the incentives for its users, especially active users who always play gambling on their casino sites. This will depend on how the casino can provide more benefits for its users to make users feel at home and comfortable playing in their casino.
It doesn't have to be a "market" for buying and selling NFTs in exchange for Bitcoin. It can be a place for direct NFT-to-NFT trading.
It would be better if the casino could have trading integrated on their site so that users can directly sell or buy the tokens. It can be a kind of diversion of tension after they have gambled before so they can at least take a break from gambling.