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by mlb_hn 3000 days ago
Answering that question may be the purpose of this request - since no one knows the state of discourse prior to or after any identified propaganda/ads, it's rather hard to assign any impact. By monitoring the discourse, DHS can then measure changes in sentiment on salient features in order to measure the impact of various propaganda/ad campaigns.

That being said, I think DHS might be going a bit overboard as far as the monitoring goes.