You know better than anyone that deleting your fb account doesn’t really accomplish anything though. All you did was change some flag in their device graph.
If you stopped using facebook it would have an effect, but I don't think deleting your profile does. Your still tagged as the same user, every fb pixel still sends data back about you, and all your transaction are still linked to you.
I cannot possibly believe that deleting your fb account removes all the info about you in their identity graph. It would just convert your active profile to a shadow one.
If I delete my account I stop using it, hence I stop giving tracking data to them and their partners.
Why do you think that cutting that heartbeat signal, even a single login once a month, has no impact? Over time all of the relationships weaken in the data graph. Think of it as bad credit history. After a while, they only use the last set of info; using stale information biases the models and is just expensive.
Also deleting profiles excludes them from tons of data model recalculations since they cannot deliver impressions, it is a waste. Sorry I thought that was clear.
My point was that they don't actually delete your account and so don't lose any data with the exception of your on-facebook behavior. I would assume that your profile still exists and is treated the exact same way as before you deleted it, just with a flag that it was "deleted".
So they still can tie back impressions to your account in the exact same way.
They cannot tie back impressions as they only deliver those on their platforms, they dont’t have an exchange like Google. If you are talking about third party identifier online syncs, any decent ad blocker will stop those. Offline syncs break after time. Data policies don’t allow you to keep anything older than 13 months.
I see the distinction you are making, and it is a very fine one. One hand you have "deleting and not using Facebook" and on the other hand "not using Facebook" - I would say they are almost equivalent to Facebook (since they don't really worry about the Delete flag).
But, once you delete your Facebook profile, you will not revert to logging in occassionally, so psychologically, it does make a difference to you (but not to Facebook).
