Google gets huge benefits from it but I think in the end this helps advertisers as well as still being able to track via the image url and a unique url/id. Good

Google gets huge benefits from it but I think in the end this helps advertisers as well as still being able to track via the image url and a unique url/id. Good deals usually help both parties with some give and take. Pros: - Since all images flow through google, phishing and other malware attacks could be subverted. - Images will be hosted faster in many cases (possibly less cost to run newsletters). - Less connections on your server/cdn from multiples sources but google singularly. - Still able to identify users legitimately but new users and newsletters will have more trouble getting your information initially. Cons: - Re-views later will not be tracked if out of cache, it will come from google the second time if is hasn't been purged (re-views are not big on newsletters anyways) - Google getting all this data as well as your company - The obvious 'national security' reasons - Limited location and meta information