Many casinos are protecting their services because of this money laundering of a thing. They are mostly recognized by the government and have different tools to detect if a particular fund is from a criminal source of not. They are sheltered by sophisticated tools we might not be aware about watching every transactions to ensure that they are protected by the money laundering act which covers casinos .and other online businesses. If the casino team noticed thatvyiu sendmt fund that is from a well corrupt source, they have the right to seize the fund and report to the government.
Even the casinos have got themselves to protect and that is why they will try their possible best to stick to the money laundry act so they don't get prosecutor by the government someday because they failed to report or probably not tolerate such when seen on their platform and that is why they make sure to monitor the influx of transactions on their platforms so they can be able to make sure to their platform isn't used to perpetuate such and get them into trouble with the government.