Due to the regulatory uncertainty in the US market we advise that all US persons read carefully the following announcement:
NO U.S. PERSONS MAY USE THE SERVICES OR SUBSCRIBE TO THE SERVICES AND THE DEMO-TEST VERSION. By using the Services, you represent that you are not a U.S. Person (as defined in Regulation S promulgated under the U.S. Securities Act of 1933, as amended), and you are not using the Services for the account or benefit of a U.S. Person.
Please refer to the current to your legal counsel for updated information about your country's legal status. You may also find information online for example in this Wikipedia page (although this page refers to the legal status of Bitcoin specifically, Bitcoin can be used as an aggregate for the policy status for all cryptocurrencies in a particular country).
Our full Demo Agreement can be found here.