You haven't checked out our ToS.
Quote1.3. Subject to your acceptance of these Terms of Use, Company grants to you a non-exclusive, non-transferable, revocable limited license to use and display the Service and related software (excluding source and object code) for your personal non-commercial use. You agree not to use the Service for any other purpose, or to copy or distribute the content of the Service except as specifically allowed in these Terms of Use.
If we ever wanted to do this (which we wouldn't), we reserve the right to revoke ownership from any account in our database, and sell it to another player if we so wish.