If I give my certificate that says "this is Brian Smith" to Amazon, and then Amazon uses it to claim to be me, then that is very misleading. It is very similar

If I give my certificate that says "this is Brian Smith" to Amazon, and then Amazon uses it to claim to be me, then that is very misleading. It is very similar to me giving my driver's license to my underage brother so he can buy me beer. If CloudShare used its own "this is Amazon.com's Cloudshare Service" certificate then it might be okay, except (1) they would be using it to sign content that they haven't verified the authenticity of, which is misleading (like notarizing something without any authentication), and (2) you almost always need to mix those static assets with dynamic assets or HTML forms and that all has to happen on the same domain--the domain that receives the POST requests, not the CDN's domain--in order for things to work reliably. As for tone: the tone with which I wrote my reply is apparently not the same as the tone with which you read it.