3 ms·
This doesn't explain how third parties would get his email address. Facebook claims they don't disclose it. Companies upload lists of email address they alread
by panarky 8y ago
This doesn't explain how third parties would get his email address.
Facebook claims they don't disclose it. Companies upload lists of email address they already have for Facebook to find similar audiences.
If he only used this email for Facebook, then only Facebook should have it.
- jahewson 8y agoFacebook says the list contains “info about you”. There’s no reason to assume that has to be an email address. Your full name and DoB will do, read the docs for yourself: https://www.facebook.com/business/help/606443329504150?helpref=faq_content https://www.facebook.com/business/help/606443329504150?helpr...
- DevKoala 8y agoThird parties don’t know his email address per say. A third party has hold of the OP’s info through a different source. This information in the third party DB is linked to a cookie or device id, or other means of digital footprint. Facebook onboards the third party data by syncing the ID they have for the OP under their origin, with the ID from the third party’s origin through a process called cookie syncing, which allows data from one origin to be pushed to another. Cookie syncing is how it is done on the web. For mobile, it is device ID syncing. To sync multiple devices, web + mobile, you use IP affinity + geo, or other means of inference and find common patterns through the stream of data. It is easy to link devices having access to the ad stream of an exchange like AT&T’s APPNEXUS for example. These are practices that were standard five or so years ago.