There was almost no advertising in my country when I was 7. I live in Poland and till 1989 it was communist puppet state of USSR (not through our choice, obviously, so the moment we could - we noped out of it).
There was no point advertising because there was no competition, all the companies were nationalized and no matter how well or badly they did - their employees earned the same. If you persuaded people to buy your washing powder instead of the other available washing powder - that just means the queues for your washing powder will be longer.
There was A LOT of communist and anti western propaganda tho. But no advertising is perfectly possible.
I live in Ukraine, and we still suffer from soviet limitations on advertisement and entrepreneurs. Every time when govt and parliament need to make some urgent reform, nobody could predict, what will really happen - as they could just raise taxes, or deform some industry with some unreal regulations, and only in few cases implement some adequate, for example synchronize with EU regulations.
For example, for banks appear problem, people avoid to pay credits, so need some enforcement - powers approved confiscation of property to pay credit, but with exceptions of unprotected people, so bank cannot confiscate from pensioners, when child registered in property, and few others, so literally huge percent of citizens now protected from banks, and this new law is step back, not progress.
There was no point advertising because there was no competition, all the companies were nationalized and no matter how well or badly they did - their employees earned the same. If you persuaded people to buy your washing powder instead of the other available washing powder - that just means the queues for your washing powder will be longer.
There was A LOT of communist and anti western propaganda tho. But no advertising is perfectly possible.