Earlier quoted context omitted.
It's a dark pattern
Maybe I'm old or just wrong, but "dark pattern" for me means "intentionally misleading" which doesn't seem to be the case here, this is more of a "add liveliness so users can see it's not static data" with no intention of misleading, since it seems to be true that the data is actually dynamic.
I'd prefer a "Data last updated at " indicator somewhere. Now I know it's live data and I know how old the data is. Is it as cute / friendly / fun? Probably not. But it's definitely more precise and less misleading.