Someday one of these password managers is going to be hacked wide open and it is NOT going to be pretty.
My layperson's armchair guess is that a successful attacker would probably seek to keep it quiet.
If you were a bad person, and you got access of tons of credentials from one of the major trust-us password managers, would you:
1. Focus on finding and looting big-payout cryptocurrency stashes, as quietly as you can (so you can keep doing it longer, before news gets out of how)?
2. Sell to a state actor to use for probably high-value purposes, while keeping it quiet?
3. Something else, and would that involve keeping it quiet, or making a big noisy mess?