Other than the operational issues, like not have a good way to contact amazon, this reminds me of a 900-number system we ran at MCI.
When you registered for a 900-number, you had to submit a script along with it. MCI would try to limit the possibility that you'd use it for some nefarious purpose, all CYA. They had a team (probably one person) that audited the numbers periodically. That didn't stop people re-using the numbers for bogus financial services and adult things.