Maybe because these sites are hosted outside the US ? But to really stop this, USPS would need o buy all possible domains that start with USPS.* That can get

Maybe because these sites are hosted outside the US ? But to really stop this, USPS would need o buy all possible domains that start with USPS.* That can get very expensive that to ICAN. Plus the USPS has no $ due to what Bush II put in place when he was president and the GOP refusing to undoing that change. I believe that was done to bust the union.