I discovered that must of the gambling sites, mostly the ones I signed up have no sign up bonus but others gave as I was told.

Because  sign up bonus is very much important to a beginner and also attract More customers to the site.

I know that, there are a lot of gambling sites that gives sign up bonuses but I have not come encounter with them.  If I told someone about a Gambling site. Some of them asked the sign up bonus.

In my location most companies give $10 +

What could be the caused of the companies that are not giving the sign up Bonuses?