But there is a difference between advertising and propaganda/activism. Printing a book that brings you to an understanding of a political idea [1] is one thing

But there is a difference between advertising and propaganda/activism. Printing a book that brings you to an understanding of a political idea [1] is one thing. Passively sticking your posters on other people books (after paying) is another. Propaganda gets a lot of well deserved criticism as it is often dishonest, we simply tolerate similar dishonesty in advertisements. [1] Whether by truth or lies does not really matter in a sense here.