ask in this forum is the best way to get info about any site or just try with low money

All you have to do is research, just research and read reviews about the gambling website in question and you'll be able to arrive at an intelligent decision. Most of them are foxes in sheep clothing so their real trait will not be evident on the spot so you can rest th m with little amounts first.
I just prefer to read reviews about the gambling sites. And it's good to visit each of their threads, most of the popular gambling sites have their threads also here in forum, you will see people complaining or giving good feed backs about their experience to that casino. You just need to be resourceful.
By only seeing if they have benag in this forum, it does not guarantee they will not be scam. There are some pesky sites that take advantage of this forum for promotion shortly after they get the big players the site will close. I think we should see if the site has been running long or not before playing in a gambling site.