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by rontr 6756 days ago
Problem is Google penalizes pages with duplicate content by lowering their PageRank. If comments are duplicated on your blog as well as on discus.com, your blog could pay a price.
1 comments
tlrobinson 6756 days ago
But they aren't duplicated, since the comments show up in a JavaScript generated iframe (although I admit that's not ideal)

The Googlebot doesn't execute JavaScript, or count iframe'd pages as part of the original page.

link