I imagine we’ll see a spectrum of compliance:

• Probably none will comply before the deadline, cuz why throw away free money.
• Some will comply by the deadline.
• Some will comply when the AG announces an enforcement action against some data broker.
• Some will wait until there’s an enforcement action against them specifically.
• Some will never comply until noncompliance (ie the cost of fines and penalties) exceeds the profits from continuing status quo.

There’s also a likely side effect where even more of the data brokers outside of CA will just not register with the state, and just wait for an enforcement action against them and pretend they never knew about the compliance requirements. And some who are currently registered may just cease operations and reorganize into new entities that can do the same. Whether it yields any meaningful improvement for California residents really depends on how hard the AG goes after these companies. If it were tax rev, they’d go hard. But since it’s not, it’s really hard to say. My guess is token enforcement for electoral optics. But who knows.