What is the logic behind the Privacy Protected Mail Client SINGTEL_CONSUMER PET table

Hi There,

clarification needed regarding "Privacy Protected Mail Client SINGTEL_CONSUMER" PET table

1)what is the logic behind data getting updated/inserted into the privacy protected mail client pet table
2)what is the relation between auto open CED and this table
3)Is the auto open ced table unique open count and is the data only there when someone opens the email
4)what is meant by "Recipients will stay in a PET until they generate an Open event"
5)If on iphone with privacy protect on, i open the email using Gmail then will the record go in auto open or open