[dwwoelfel]

I think that bandwidth consumed by Circle should be free, since we're also hosted in AWS. Maybe somebody who knows more about the details of Amazon's billing can confirm/deny.

[DrJ]

bandwidth is free in the same region, but not across regions.

*edit and I believe not if you end up using the public IP address instead of the internal ip address.

[tbarbugli]

if you use the ec2 public dns it will resolve to an internal ip when the request comes from within ec2