@skribe Conversely, the cost of printing, distribution, and storage puts up a barrier to spamming people on other continents with mass quantities of low value slop.
Just think through the logistics of a hostile Eurasian state sending a mass quantity of printed materials to Australia or North America.
Or, for that matter, a hostile North American state sending a mass quantity of printed materials to Europe or Asia.
You would either need:–
a) At least one printing press on each continent;
b) You could try shipping the magazines, but they'd be a month out of date when they arrive; or
c) You could try flying them overseas, but that would be very expensive very quickly.
That's before you worry about things like delivery drivers (or postage), and warehouses.
These are less of an issue for books than they are for newspapers or magazines.
And if a particular newspaper or magazine is known to be reliable, written by humans, researched offline, and the articles are not available online, then there's potentially value in people buying a physical copy.