Compared to many other casinos this are very strict rules, and they should have more relaxed rules for good old bitcointalk members.
I remember few years ago they had similar rules and that always pushed me off from using them as one of my regular casinos.
Cloudbet KYC policy is indeed strict compared to most other casinos. They don't say that the KYC verification is mandatory, but they apply the KYC verification rules to most of the users. Nowadays, most of the gamblers are habituated to the KYC verification requirement as it has become very common. As a result, you will rarely see complaints about KYC verification being applied forcefully. Most of them complete the verification whenever the casinos apply it to the users.