This is due to the fact that most of the cam websites in the world are scammers.
They make the website and then you get to see after you register that your credit card info and and other details are stolen from you and not to mention your registration fee as well.
This is a serious matter since you will get nothing in return and if you are fooled there nothing you can do about it.
There are a few factors which can help you decide on a reputed site though like for example
These portals are run by fellow users and members of various cam sites and will help you decide on which cam site you should go for.
Go for network companies All of these portals are completely free to join and you can communicate with anyone over there.
They give accurate info most of the times regarding the websites helping you to have the best experience possible.
It is safe to say that if you see an offer which is too good t be true it usually isn't true.you can register as a free user and check to see if you like the website and if you think they are trust worthy.