Why did the US Gov shut down all 73K blogs on Blogetery.com?

This is very early in this story, and very alarming. China has been exerting this sort of pressure on blog hosts that have chinese citizen blogs on them. Why would the US shut down every single blog, even the innocent ones, on a free wordpress blog provider?

h/t: John Jay Ray

Amplify’d from www.helium.com
Recently targeted by federal action, the free WordPress blogging site Blogetery abruptly came offline after hosting provider BurstNet complied with undisclosed demands from authorities. A message viewable upon visiting the Blogetery site gives this message from its owner: “After being BurstNet customer for 7 months our server was terminated without any notification or explanation.” A link on the site leads to a forum called Web Hosting Talk, where the site operator has posted correspondence with BurstNet, that suggests feederal involvement in the incident. Read more at www.helium.com