Conversely, her applications of reason resulted in a wonderful defense of capitalism.
She contributed much in her work on the subject of capitalism. I don't think her views on atheism did much harm. She came out of Russian society with the Russian anti-God ideas. However, she rebelled violently against the Russian anti-capitalist ideas.
Her contribution, such as it was, was to offer an attractive-sounding, if simplistic, defense of capitalism.
Unfortunately, her vision of heroic individualist industrialists does not address the sort of corporate conglomerates we see all around us today. The individual moral rules she embodied in her characters does not translate well into a huge multi-national corporate environment.
As an economist, she was a pretty ham-fisted novelist.
In terms of her influence, I think the most telling example is the man whom she excommunicated from her circle of disciples: Alan Greenspan.