In the crypto industry, exchanges and stablecoins are often mentioned as the 2 most profitable business models. I think people forget to add crypto casinos to this group. They're also profitable and good for the long term as a crypto business. Look at some popular crypto casinos, they're able to become sponsors of big EPL teams. I feel like crypto casinos are more profitable compared to exchanges. But I don't know the exact data.
Speaking of the economic models, I think buyback is never wrong as a bargaining point. Especially when issued tokens are bought back using the real revenue generated by the casino itself.
Rewards for token holders are not as strong as the buyback feature as a reason to buy and hold the tokens. Rewards, especially casino related rewards, are really niche, very segmented, for casino users (gamblers) only. If the reward is like a dividend, it will be a different story.
Wager-to-earn? Nah, I don't really like it. Making people gamble on your platform is already difficult. Encouraging them to wager just to earn your tokens won't work if you want to push the market for your token. Also, there's no reason to hold it. The token would just end up as funds for gambling or be dumped easily in the market.
IMO, before issuing a token to add an extra layer to its economy, the casino should be big enough in the market. It should be well established financially and have a strong brand. At least the casino should already know (or be able to predict) how much it can earn monthly and annually.
Exchanges and stablecoins has nothing to do with casinos and that's why they wouldn't put them side by side when such discussion arises unless it's gambling related, casino business is lucrative business but it's gambling, it's very different from exchanges and stablecoins.
I like the buy back idea but with the little experience I know I think it's more effective when the token max supply is very limited, buyback and burn does nothing if the total supply of a token is in billions or infinite.