pretty bad and rambling explanation, but:
Butler is infamously obtuse but the passage just means that the structuralist analysis of capital shifted from one where hegemony is understood to be more or less a rigid top-down power relation to one where capital is in a process of continually transforming itself. an example of this is the "woke capital" phenomenon; capital doesn't merely remain socially conservative even if those are the conditions that primitive accumulation creates and relies on, but it also at different stages of development can conceal itself by mimicking cultural shifts.
Deleuze's essay "Postscript on the Societies of Control" explains this concept really well imo:
>The different internments or spaces of enclosure through which the individual passes are independent variables: each time one is supposed to start from zero, and although a common language for all these places exists, it is analogical. On the other hand, the different control mechanisms are inseparable variations, forming a system of variable geometry the language of which is numerical (which doesn’t necessarily mean binary). Enclosures are molds, distinct castings, but controls are a modulation, like a self-deforming cast that will continuously change from one moment to the other, or like a sieve whose mesh will transmute from point to point. https://theanarchistlibrary.org/library/gilles-deleuze-postscript-on-the-societies-of-control"enclosures" = "structural totalities as theoretical objects"
"controls" = "the contingent possibility of structure [inaugurates] a renewed conception of hegemony as bound up with the contingent sites and strategies of the rearticulation of power"
I think Deleuze explains this better because he bases his ideas not purely in poststructuralist jargon wank but also throughout his philosophy makes use of mathematical and scientific concepts, and his idea of control here is pretty obviously connected to the cybernetic concept of control.
>These are the societies of control, which are in the process of replacing the disciplinary societies. “Control” is the name Burroughs proposes as a term for the new monster, one that Foucault recognizes as our immediate future. Paul Virilio also is continually analyzing the ultra-rapid forms of free-floating control that replaced the old disciplines operating in the time frame of a closed system.Deleuze contrasts disciplinary societies, a closed system which disciplines its subjects to conform to the fixed ideas of a hegemony, with societies of control which is an open system engaged in feedback with its subjects to have a self-deforming hegemony that is able to continually conceal itself. this is probably also why Deleuze hated all the fixation 20th century philosophy had with language, because language games are how the societies of control change their appearance without changing materially.