Throughout the novel Solzhenitsyn condemns artists who compromise or collaborate with Stalin's regime to get their work by censors. Why? What is an example from the novel other than Kolya Vdovushkin?

I think Solzhenitsyn says compromised art ceases to heart. Compromising art to get by Stalin's sensors negates any artistic merit it might have had. The soul of art is freedom of expression rather than compromise or homogeneous expression. Sergei Eisenstein's famous film Ivan the Terrible is another debated work in this story.