I don't understand the meaning of this gamblers' division into subtypes. I don't like all these frames, personality types, and so on. They create the effect of artificial restrictions. Human characteristics are too complex and multifaceted to be crammed into a list. I don't consider myself to be of any type, and gambling plays the role of a challenge for me.
I think the previous reply stated that these types are used to treat gamblers. Knowing the reason why you gamble is the easiest way to track the root cause of addiction and tweak it for the gambling addict's treatment.
I wonder how does this classification create and effect of artificial restrictions? It doesn't restrict your gambling or your freedom. You can either believe it or not or follow their terms of classification. After all you won't be using this stuff when you are engaging in gambling. Medical practitioners might be using them in identifying the cause of gambling addiction of their patient