Transactions that happen in Mangolassi would be covered by US law because when you post on Mangolassi that is where it is hosted. I buy my house water filers from a company in Idaho. I live in Illinois. I can sue that company if I wanted in Idaho state court or in Federal court because it is commerce across state lines. I cannot sue them in Illinois court. They don't have a business presence in Illinois and are not required to comply with Illinois law. As the consumer, I am aware of this, I always look for where the person/business is that I am about to buy from is located. Someone in Spain who uses the internet and accesses something, not in their country is agreeing to use Mangolassi which is governed by US law and not EU. A person using the internet to access something in America is no different if they used a plane to come to American and do business either way they are covered under US law