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I quote the above case as a precidence to what really string up in my thoughts, and this question goes to those technically exposed gamblers, where do the coins actually goes to in reality?
Are coin send with wrong network actually lost?
Do casino have a system that can retrieve the money?
There could be two possibility.
A. The casino has full control over receiving wallets. In this case, they would most likely provide the same receiving address for all supported coins i.e. you get the same address for USDT BEP20 and USDC ERC20. So there is no chance of mistake and you would be credited any supported coins sent to it.
B. The casino uses a third party to convert crypto into USD or something similar and they don't process the payment. In this case, you are likely getting temporary deposit address or different address for different coins.
There sure could be other options in between but these two are most likely. Almost all of casino I use are type A so there's no chance of mistakenly sending of supported coin to another network.
I don't see why the casino or exchange would provide different address for supported chains if they have control over the wallet.
This is a very good answer, tsaroz. The OP didn't ask whether you have the right to recover these coins, and this topic has nothing to do with the casinos' different terms and conditions, but with what technically happens to the funds.
Different networks may have different addresses, and in that case the coins would be lost. But in the case they share the same addresses, those who hold the keys hold the coins. Who holds it and if they're willing to send them back to him is a question that must be answered case by case.