Compared to total number of gambler, addicts are a very small fraction.
I do not think so, according to a report I have read before, out of twenty people, five people are likely to be addicted, you do not just know them because gambling addicts do not want to tell anyone that they are addicts. Out of 100% of the people that are gambling, do not be surprise to see 20% among them to be an addict. Though more of gamblers are not addicts, I mean 80% percent are not likely to be addicted, but that 20% is still a very high number if related to the risk gambling can pose.
I think there are two types of gaming addictions:
1.- The gambling addict, who usually gambles as much of the time as possible, and does not mind risking a lot and losing it, in general these types of people tend to lose everything, and have many problems and pretend that nothing happens.
2.-The other type of player who usually goes to the casinos and watch them play, they play little, usually they are in the casinos to see and take advantage of the food and drinks (this in the traditional casinos) the case of the casinos online there are still them, I think they play very little but they like to be there, and that can also be treated as an addiction because they stop doing the normal activities of a common person.
These types of people are usually divided into many branches, but they start from those first two premises. I have a friend who is a psychologist, and he tells me that everything starts from there.