Very much agree with you, staying very safe online, not just in the use of gambling casinos, but also in the use of other online services like exchanges, games , dapp and so on, research is very important, and paying attention to feedback from other users is also a great way to not fall victim to scam and hacks..
But then again, for those trying out new sites, like a new gambling casino that does not have any feedbacks from users yet, I also advice people to avoid such sites. But on occasions where some people must play on such casino for whatever reason or reasons, then it's better saver to do so starting with a very tiny amount of money, try not to make another deposit, but grow that tiny amount to a tangible amount and monitor how hard or easy it is to achieve that, or if it is impossible to achieve, at least, in that period of testing, the players can get feedback from those playing with big amount of money.
While your call for caution is commendable, not all that glitters is gold... or in this case, not every new platform's silence is a sign of deceit. Yes, yes, research and user feedback are indeed the backbone of smart online decision-making. However, might I suggest a more discerning lens?
New casinos can be goldmines or mineshafts leading to oblivion. But isn't risk the very essence of gambling? Instead of a "tiny amount," how about a thought experiment: consider your deposit as the price for a lesson. A lesson in discernment, risk assessment, and, if you're lucky, a pleasant surprise. But here's the kicker: the logic isn't watertight. If all new players approached with such caution, would there be any feedback at all?
There is obviously nothing wrong in joining a new platform for experimental purposes, but even for that, one should do their due diligence before joining it even if it's just to experiment and try the platform out because they are offering an awesome promotional bonus, you will still be depositing real money and it is not worth it if the platform turns out to be a scam and doesn't allow you to withdraw your funds when you have managed to win something good.
However, what goes wrong in trying? As you said, the platform that is just launched might be a legit casino and it might prove to be a goldmine for the gambler if they get a high amount in bonus and they manage to win a significant sum of money and also complete the wagering requirement with that.