I don't really support the idea of sharing KYC information with an online casinos because who knows what they will use the information and do when they are not more in operation.
Besides storing information what else can casino do with our passport and ID scans? Do you think they will on purpose or themselves contact your local tax authorities and provide all the information about your deposits and withdrawals? Do you think that one day person who is responsible for data bases and information will make a slot on dark market with archive of private documents? Or same person will try using your documents try to gain access to your accounts on other platforms?
First, there is risk of data leakage. The casino can have best will to store the data safely, but every database can be hacked and subsequently sold on the black market.
To inform about consequences about personal information leak I suggest following article:
What happens when your identity is stolen -- real story || Avoid CEXs!It is said also that "
It didn't happen after using a centralized exchange". The idea of this story is to warn people from uploading documents everywhere. But casino isnt "everywhere". Imo they are more secured that other places where people upload their documents. First thing that came to my mind are travelling agencies or rentals (the one that are not branded; some local with old cars, which foreigners prefer due to low price). People freely give them to copy documents or send by email. Those places are unsecured and should be avoided. Casinos imo are more protected from hackers. Moreover, for hacker, money would be a priority to steal.
Thanks for the link, it is pretty interesting read. As for uploading documents, I agree that one avoid uploading documents, but in my opinion this includes casinos.To be honest Id be vary to upload documents anywhere, including state institutions. One weak point or dissatisfied employee is enough to get personal data leaked.
The larger the company is, the closer control over the work of employees is. For example at work I work with lots of third-party data and private data. Every search and request in system is being recorded. If I would be that one dissatisfied employee and cause damage to company by stealing or sharing other people data. It will be easy to identify when and what I did, as well as not hard to find me personally (I hope not

). In other words it is easy to catch and punish me. Casino, as a place that works with large amount of money, work with risk and have thousands and thousands of customers, chances that documents could vanish, and nobody would get caught or be responsible for that, are very low. As usually, nothing gives 100% guarantee and there is a place for exceptions. But I believe that casinos are not top places where users private data could leak easy.