[legitster]

I maintain marketing systems for a living. Not sure what you are hoping to achieve, so it's hard to know what you are doing "wrong" but to clarify a few things:

- There's a pretty big difference between how first-party and third-party cookies behave. First party ones would live on the actual webhost of the site/service you are using. Third party cookies would be the responsibility of the advertiser/etc.

- All of these systems are designed for massive scale. Out of the thousands of random hits in a given day to a webpage, only a few dozen might return in a meaningful time period. So cookies are designed with a lot of disposability.

- If you maintain an account of any sort on the website in question, it could all be irrelevant anyway. If we have a user or customer ID, and we recognize that you are a customer, we'll merge your cookie IDs together whenever we recognize you. (Or forgo cookie data altogether).