The Hershey Company has settled with Let's Buy British to ban all imports of Cadbury chocolate from Great Britain to the United States. Hershey states because they own the legal rights to produce & sell Cadbury in the US, all importers bringing in Cadbury from the UK are infringing on their agreement.
The US has a large population of British expatriates who grew up with Cadbury chocolate & rely on small businesses who carry the chocolate to have a taste of home. Cadbury also has a large American fanbase who enjoy the chocolate. The small businesses & customers help keep the US economy going, encouraging free trade.
With Hershey's banning all imports of Cadbury & others, many businesses that carry the Cadbury name will go out of business.