Haven't heard of this kind of bookies that you call illegal, not sure how they are being promoted online as obviously, there are a lot of legal and great sport bookies that we all know and why take the risk on using fly-by-night bookies by college students?

Maybe this is just within the campus and not globally though, otherwise it will have been taken down already. And for this illegal bookies, they just go and be under the radar as they don't want to be exposed and be on the authorities prying eyes. Of course, it's going to be easy to hack if they want to. So is bewildering for someone to used them. Maybe if you are a newbie in sports bookies. But if you have years of experience, I doubt that you will fall for this trick.