I should've clarified that I meant to ask a more general question.

Going back to a particular exploit, certainly it could be used against multiple targets, in a small time window.

There multiple potential targets (for various reasons) at any time.

And there's also the option of mass-compromising endpoints or servers of a platform, and adding new hidden backdoors/weaknesses that persist long after the initial vulnerability is removed (e.g., in various kinds of firmware).

Or even just mass-cataloging of one-time compromised identities.