I would have expected a change of the subscriber agreement to be mentioned in the ISRG email newsletter, or blog, or at least a forum post here. And the only real change is that additional clause about sanctions, hmm? That's… interesting. Between that and the subtle change in their transparency report it makes me rather curious if something interesting involving the feds happened, though. Though there isn't really any evidence for anything beyond a scraped-together conspiracy theory.
The subscriber agreement, both before and after, says this about updates:
In addition, major changes will be flagged with a new Subscriber Agreement version number in the ACME protocol, so You may be able to configure Your ACME Client Software to notify You of such changes.
Are there any ACME clients that implement such a feature?