A license gives more credibility to the site but it is absolutely no guarantee that they will not scam you. It also works in the other way: an unlicensed casino can still have a very good reputation, but it takes some time to build reputation. I am always carefull with newly launched casinos even when they have a license.
It is true and companies have to build up slowly and nothing can be achieved too quickly. Roobet have some years here and I do think they are in good growth here and there. They have good reputation on bitcointalk too. In addition, they are successfully enough with their games, promotion and contests.
Take advantage of the credibility and authenticity that licensing offers. There are certain standards operators must meet in order to run a casino gambling site. Since the gambling industry is highly regulated, licenses are required. As there are the majority of online casinos, I always choose to play at one of those that have a reputation to reduce the risk.
I don't see any relation of those issues with Roobet which have license and highly trusted reputation. Young casino have to prove themselves that they are good with game operations, award distribution and good support. They must show that they are able to proceed awards for winners. Especially if gamblers on their gambling sites win big. If a casino pull out a KYC card or account restriction card after a specific gambler wins big, it is not too good.