Roobet is one or the highest growing casino in the online casino space. It has a very good reputation in the forum. All the campaign I have seen or met as I came to the forum Roobet is one of the last longing I know. Although I have seen other two like Chipmixer and The Best Change.
Those type of companies are there basically for just security reasons and not because of hard work. Collecting KYC and keeping them secure is not that much of extra work and any casino could do that, just put it on some offline server where nobody can hack, and you will be fine, there is absolutely no trouble at all.
It is done because of governmental pressure, if you use KYC company supported by the government, then you could legally be a casino without a trouble and would be able to say "we worked with the government on this" and get away with it, plus you could tell the gamblers "we do not hold any of your information" which is good for marketing.
But I have not heard any bad report on Roobet both in payout or in security. Roobet uses their KYC and also ues it to secure their transaction. Yes online server is the best option for the use of KYC. Government pressurized casino companies to use KYC because the security. Many gamblers use different information in the process of registering KYC. There are sometimes the information used in the site is different from the DOCUMENTS provided for the prove of ownership. That is where the problem is always escalating.