A lot of threads in gambling section are basically dedicated to scam accusations. They can be seen every day on the first page. The casinos about which people complain are usually new or known to be scamming people (one can easily check out the trust of members leading the respective ann threads to be assured in that). I don't understand why people deposit money onto new casinos and then complain that they scammed these people. I mean, there are lots of very trusted casinos offering a wide range of games, so why not to keep playing at them rather than some unknown risky ones?
Because people like new places and perhaps new gambling site can offer some new games or better promotions. Another reason could be because players lose at one gambling site and they think they will have better luck on other site, new or old doesn't really matter. But i will stick to first reason - people like new places.