BitKong has been operating for 7+ years, the fact it has no license makes it less trustable?!
The reputation of a casino is more worthy than the license of the casino. But the gamblers search for the license of a casino now when a new casino arrives in the gambling world. There are few more old casinos running with their reputation without having the gambling license (Bitvest, Bustabit, Bustadice). The license will only cost a few thousand dollars while their reputation is worth than hundred thousand dollars. BitKong is trustable than a new licensed casino which has no reputation.
The license is used by the casino to get permission to operate with certain authorities and keep the casino from having problems with countries that prohibit gambling, but with a casino using a license it will ask KYC for gamblers who register.
In the gambling industry, licenses are now one of the virtues that casinos must have.
Many casinos are new to their license but don't have a good reputation yet, naturally they are still new to the gambling industry so they don't have a good reputation yet.
Regarding the old casino with a good reputation but don't have the license you are talking about, I know it, but for me the license is no less important to prioritize if you want to use the casino.
I have seen many people who, when a casino does not have licenses, the first thing they do is criticize them until I make them have them, but the licenses also mean that casinos can still turn to the bad side and can create a big scam, I don't know They have realized that the casinos that have all the licenses, that require kyc, then this does not guarantee that it protects the players, I have always said that the casinos that are older and that have a good reputation is another case, they already have a seniority and a trust earned, in my case those are the casinos that I trust the most.