Not all the times that they are scam which there are still some legit ones and also you can easily spot it out which one is well-made or serious one by just looking into its design first.
First impression do last as we know.
scam sites also comes in gooder designs that are hard to spot but we can test them out by depositing tiny amounts , play the game and try to withdraw . if all works smooth then it should be legit . you know if its a scam if there are many accusuations for that site . a legit gambling site are also being advertise here regularly via ads or via signature campaign and also if its been managed by trusted campaign managers . if a gambling site want to be trusted by promoting via thread , then they should get a proper forum account with good trust and a high level account so that people wont doubt .