From the FAQ:

> The HTTPS trigger is intercepting all my traffic? > No, your data are safe if your server support HTTPS protocol. All the data exchanged between your server and your clients is encrypted and not accessible by us.

Unless there's an IP allocated to each user, I don't think this is accurate. With SSL, the HTTP headers are encrypted, so there would be no way to know where know where to route the request without first decrypting the data, and thus having access to the data.