[PU4, Powers] What does Cosmic power modifier actually do?

[Gurps Fan]

Power-Ups 4: Enhancements is an impressive book: it newly classifies and greatly clarifies the effects of various Cosmic enhancements. It's now clear that the term "Cosmic" doesn't mean that the ability originates from primordial energy of the cosmos or whatever, but a mere catch-all label for "instantaneous acceleration", "no active defense", and other rule-breaking effects. For instance, by combining three instances of +50% Cosmic and renaming it as "Second Nature, +150%" (PU4, p. 9), we now can even pretend that the term "Cosmic" doesn't exist.

Then, a new question arises: What does Cosmic as a power modifier actually do?

PU4 doesn't say anything and leaves it all to Powers.

Originally Posted by Power-Ups 4: Enhancements, p. 7

All "flavors" of Cosmic can be found below, with the exception of Cosmic as a power modifier. Power modifiers are beyond the scope of this book; see Powers for details.

However, Cosmic power modifier itself does nothing -- it just means that the modified ability belongs to the power Cosmic (here the terms "ability" and "power" are used in Powers sense) and just gives it an in-game explanation like "originates from primordial energy of somesuch". Adding a power modifier is sometimes advantageous (gets +1 skill bonus per level of Cosmic Power Talent), but sometimes disadvantageous: e.g., abilities that belong to Cosmic power can be targeted by Neutralize, while "raw" advantages can't.

Cosmic power modifier is a +50% enhancement. It must enhance the underlying advantage in some way to such an extent that +50% seems to be a reasonable price. Does Cosmic power modifier do anything useful that deserves +50%?