You think they don't know that a lot of people are going to be using VPNs? Of course they and to them its a good think because they would be generating revenue from those customers who one way or the other are in the United States. What they have just done which is a good business decision is to ensure that they absolve themselves from any liability that would arise from servicing citizen of the United States and transfer the duty of care and responsibility absolutely to people who have chosen to use VPN. It therefore means they are not under obligation to comply with any regulations from the United States authorities neither can they be liable for any misgivings that would arise from such actions because technically they don't provide services there since they have blocked the IPs from such locations.