There are a plethora of illegal books, many run by college students, young adults and even teens. How secure are these websites??
What I am really asking is how easy (possible) would it be to hack the site and change a users balance without being detected??
Which sites are you referring to? maybe you can give some specific examples?
It's obvious that I absolutely wouldn't trust a site like that.
And it's obvious that numbers in a database can always be modified. Of course they can't have the same safety rules like a big operator. I will just use only legitimate operators I will never deal with unregistered one.