This means they’re operating under a set of rules and standards enforced by their regulators.
Don't forget that 1xbit was a licensed casino as well. But they are well-known scammers. I played on Megapari before but did not encounter anything bad. Judging from the website design and script, Megapari looks similar to 1xbit. They could be a sister concern of 1xbit. Nothing is confirmed. However, a licensed casino does not mean they are not going to harass anyone or won't scam anyone.
Haunebu also said that Curacao licenses don't mean much. The license operators sell the license, and that is it. I don't think they help the players if they are in trouble. I don't see too much difference between the licensed and unregulated casinos. When I play on a casino, I don't remember checking if they have a license or not.