That could also be explained by there not really being many other options. I don't think too many people really wanted to send postcards with Lenins and red fla

That could also be explained by there not really being many other options. I don't think too many people really wanted to send postcards with Lenins and red flags for holidays, but if this is all you have, you'll buy that. By a similar token, Brezhnev's "memoirs" (Малая Земля etc.) were published in millions, but I have never heard of anyone who wanted to buy, let alone read them.