American is offering 3,000 miles for opening a new Netflix account by the end of the month. You can open an account for a mere $8.99/month, and cancel after the first month and still receive the bonus miles. Keep in mind that this is for those that haven’t been members before, and Netflix seems to be good at determining who has been a member in the past, so don’t try to fool them.
While I’ve seen promos offering 3,000 Delta miles for a new Netflix account, American miles are far more valuable. This is enough to get me to sign up for a month, and entertain me for at least a couple of mileage runs.