Thats true, having a license doesnt guarantee that the casino is not scam and can be trusted in the long run because this still depends on the casino's build reputation and it really takes time. Roobet is one of the trusted casino existing nowadays and I bet we are aware of their reputation here and outside. They're consistent with their marketing strategy and promotions and if there's an issue they are fast to resolve it. Plus their support is online often if there's an issues which I like the most.
I have no idea about license of gambling but there are a lot of business who opens their busienss first and then try to take licence and also on several business licence cant not be approved for several months/years but it doesn't affect too much on their business. It may happen for gambling too.
In Crypto that's the normal behavior, first, open the business then try to legalize it if you get to big xD
Probably they are still raising funds since having a license it not easy at all, it takes time and a lot of money for the fees. As far as I know, Roobet introduced on this forum with a license already and that’s why it easily attract gamblers. I think having a license at first is very important, this could be the first reason to trust the site.
License would be just only one of the factors because knowing that you do deal with a license gambling site would somewhat give that feeling of assurance that you are dealing with a legit site but thats not always the case because we do know that not all licensed turns out to be legit in the end of the day.
Roobet of course did really make a good job on hooking players by those decent and generous prize pools on tournaments and competitions
which did really make a big impact on what they have now in terms of popularity.