50-point Abilities

[Gurps Fan]

What Basic Set says is "Nonsentient creatures cannot learn skills or have any purely mental traits" (p.B15), nothing more. Though it's obvious that they can't have anything like Bad Temper, Lecherousness, Squeamish, Vow, etc., I suppose that there's no rule that forbids zero-IQ entities from taking social traits.

Actually, the rules even recommend that they should take certain social traits. For example, Social Stigma (Valuable Property) is clearly listed as one of the traits "common among machines" (p.B263). The point is that the mecha is not (and not regarded by society as) a person, and in GURPS terms the Social Stigma disadvantage represents such a state.

Wealth (Dead Broke) will also fit the mecha's social state: it has no money or other property. This and the fact that the mecha is nonsentient are two, different matters. Since it has no money, it should be represented by the trait Wealth (Dead Broke).

And yes, every car, refrigerator, television and similar thing should take Social Stigma (Valuable Property) and Wealth (Dead Broke), I suppose.