The US government is not going to be able to shut down offshore tube sites -- that is utter fantasy. In fact, the US Government could give -0- fucks about domestic porn pay-sites losing money and going out of business --- THAT IS THE EXACT GOAL.
When most of the pay-sites go broke, having had their IPs and DNS blocked [if that is even remotely possible], there will be no content left to steal and porn tubes may fade away or survive off of amateur self produced porn distributed free or cheaply on porn social media.
Get on your dinosaurs and ride into the sunset
Only by tying the matter up in court will you be able to survive -- operation by judicial order sucks big time -- been there done that c. 2004-2007