Shilling by nation-level actors often involves paying South Asians or Africans to create profiles claiming to be an ordinary person from somewhere completely different. Or people in said countries may not even be paid by a geostrategic rival but are shilling because they identified profit potential in e.g. selling MAGA merchandise. Obvious what they do depends on pseudonymity, and would fall apart if their real names were shown.
I don’t think that’s true, unfortunately. You have lots of cases of major propaganda accounts found to be foreign actors and pretty much nothing happened to them
The astroturfing relies mostly on anonymous users. The vast majority of trolling and shilling on Twitter and similar platforms is done with fake identities. So you have a few open shills who are using their real names, with massive campaigns enabled by anonymous/fake users