update
I turned off the 50% program. I am not being advertised anyway. It fits with being a third-party seller here. FAA is an aggregator. The cookie information goes to Pixels.com, the information never comes to me. (edited to simplify)
Abbie, I have a better question. Is it automatic that the subdomain serves a cookie? Would that mean I can skip this? Google advertising might just need me to bring it up with them in writing for them to fill it in. As a third-party seller, it is a PITA but common to have to write to FB or Google for their merchant accounts to accept the aggregator information.
In that final analysis, Sean would not get involved directly. Google ads would do a technical move behind the scenes and let it pass.
Thanks for letting me talk it out. I needed to bend your ear. Smiling.