Well, scammers are very rampant in the internet so if newbies will be easily lured by those tempting offers, expect that all those offers which are too good to be true will certainly turned into scams. That is the reason why we need regulated gambling casinos to lessen the scamming incidents, and to maximize reputable casinos in the market. And by having provable fair system, having rigged games are discouraged so as to give fair games to all.
Even with regulation or not, scammers will always be a part of any industry, especially in gambling industry.
To minimize the number of scam incidents, the precaution should always have to start with the user itself.
Newbies are not dumb to fall easily on those tempting offers but unfortunately, not all newbies are like that.