Can I use Email Analytics without tracking Personally identifiable information (PII) for each open?
You can, by using a unique user identifier (or merge tag) other than email address. You could use a customer number, subscriber key, or any other string that is meaningful to you, but meaningless to us. We only store the data that you pass to us through the use of a merge tag in conjunction with your ESP, along with the other standard data fields available in our CSV exports.
To use an alternative unique user identifier, select "Other" as your ESP in Step 1 of creating your tracking code and add your custom merge tag: