So the US single site license is more than the perpetual license?
No, those are perpetual licenses. But they distinguish between geographical scopes, so, not counting subscription, each perpetual license is $9775 if everyone works at a single site, $14663 if everyone works on the same continent, and "contact us" otherwise. Maybe that's why Renesas bought them, so they could give themselves a break on whatever the "contact us" global pricing is.
The situation with Multi-Board and perpetual licences is interesting. If you let your subscription lapse, even perpetual licence holders who have it under grandfather rights will have it removed.
So, to continue using a feature in your perpetual license, you must have an active continuous subscription, or they will remove features. There has been some discussion of this over on the Altium forums.
Same with the new Constraint Manager, which is extra ridiculous because for at least one minor version they actually
removed the option to create a project using the older Design Rules dialog.