The fact that a site has been online for a long time says nothing at all. They do not have a gambling license and therefore it is easy to make victims, as you will not be able to get redress anywhere.
If the site is legal, why isn't there a gambling license? And where are the company details?
Although ‘TheQuin’ answered your questions, I want to say few things more. At first freebitco launched their site as a bitcoin faucet. And it is the highest paying bitcoin faucet which is still running. But now this site is well known as a casino or betting site as they have made many changes. Though they don't have gambling license but I consider this site is better than a new launched casino with license. Cause, they are one of the oldest site, still running and paying out their users without any issue, you can't find any valid report against them. From my view FreeBitco is a brand itself, they don't need license to prove their position.