I don't take a gambling license for online very seriously, from any country. I take feedback from real users and from my network of people that use CB, more seriously. But each their own. I appreciate the link , though it shows everyone as being paid so it's been a 3 or 4 year scam of people being paid? Anyway...
Yes, they have 2FA and e-mail confirmation for withdrawal.

I typically play at Nitrogen Sports, which normally has better lines and they pay out within the hour, but Cloud does offer me instant withdrawal up to around 3.5 xbt a day... I'm not sure how a scam book would have instant withdrawals? I don't like the fact they are a Montenegro book , but besides canceling lines or canceling payouts for people with 50+ accounts, is there any real evidence of them stealing people's money? I don't have a lot of respect for people who take shots at bad lines, they deserve to have the bets canceled. (I've had hundreds of bets and none have been canceled) They have paid out around 22 xbt to me in the last week or so.
To false and misleading claim they would have a license is the criminal offense of fraud = scam! Scam do not only rely on whether a site pays or pay not.
The advantage of a license is that the identity of the operator/management is known and if the licensor do not fulfill its obligations, then he might could be hold liable as well. So the advantage of a license is that you have identities of liable people.