Are bitcoins marked as "dirty" when received from a casino?

[snipie]

Usually, I send the money to my wallet and leave it for some days, then I send it to the local exchanges or I buy altcoins first and send it to the exchanges. So I haven't had cases of the Bitcoin marked "dirty" because I use the other ways. So far that works for me and I don't have a problem with the "dirty" funds. But if your country prohibits crypto, they will consider that your Bitcoin is dirty and not allow you to transact in the exchanges. If I send Bitcoin directly from my wallet after I receive from the casinos, that will be okay and I don't face any problems.

Bitcoin is easy to track unless it was mixed which is another option to avoid being tagged as dirty but also can be at the same time a problem since some countries don't like mixing services.
Same goes for exchanges, governments can track their money and a solution working today might not be available tomorrow because of the regulations imposed by these services and if they are out of the jurisdiction of that country then they will ban it and track its money if they want to. It requires a lot of efforts by the way, that's why the steps towards imposing it isn't fast.

[Johan van Der Walt]

Nope and I haven't encountered what you are describing OP.

However, there was a time where my BTCs were questioned by my local exchange given that the latter had a policy against online gambling. Given that I was employed in a signature campaign that promotes online gambling and the pay is directly transferred from the online gambling website to my local exchange wallet, I was flagged and questioned about the origin of my funds. Luckily after some explanation, I was able to take custody of my BTCs and I transferred to another wallet since then.

Thankfully, my current signature campaign pays out the coins directly through our preferred BTC address, so I don't have to worry about getting flagged anymore.

And these aren't from the casino either. These are received from exchanges. Every payday, I convert the required USDT to BTC in an exchange and then withdraw to my wallet to send the rewards to the participants.

Interesting- I remembered my local exchange questioning the origin of my BTCs since they were able to track that it came from an online gambling website. Ever since, I transferred to another wallet in order to avoid encountering the same issue again.

Yeah, that happens more often than people think. Some local exchanges just have those strict filters running off third-party data and they flag anything tagged “gambling,” no matter if it’s from a licensed site or not.

From the operator side, it’s kind of frustrating because there’s no universal logic behind it, one vendor flags you, another clears you completely. A lot of casinos actually do KYC and rotate payout wallets just to keep things clean, but the analytics tools don’t always pick that up. Until they start considering who’s regulated and who isn’t, the self-custody hop is honestly still the safest move. Keeps both sides out of unnecessary drama.

[Harkorede]

Sometimes they are only marked as suspicious when received from a casino, I've had instances where I was asked the origin of my coins or deposit from either an exchange or another sportsbook, but it's never been an issue when you just tell them the source that it's a casino or sportsbook.

I guess that usually isn't an issue from my end simply because of the stance of gambling in my country, so it might have been another whole story for country with extreme regulations and restrictions on gambling.