I'm not sure the government really cares about all these dark web sites that they've been attacking (with the exception of TorMail). What they are primarily concerned with is the anonymous communication that takes place on the dark web, and the protection it affords whistle blowers. The government has gotten so used to having unfettered access to our communications via e-mail and social media, that it can't stand any hindrance to its ability to violate our privacy.
The true motive behind these raids, as I see it, is to justify and procure the resources necessary to wage a full scale war on the dark web.