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Ask HN: How was this ad targeted to me?

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41–50 of 93 posts

Re: Ask HN: How was this ad targeted to me?

#41
post #37

Earlier quoted context omitted.

Ironically, that's the only good tech employer in France :D

In your opinion which others come close? Which employers would you recommend avoiding?

There is nothing else close, there is no google facebook microsoft in France.

Re: Ask HN: How was this ad targeted to me?

#42
post #29

There are so many ways: - you opened a web page with a facebook's like button and facebook analyzed your browse history. If you browse for something in google shopping you might want to buy it, so facebook added it to your interests and showed an ad later to you. (Probably this was the cause) - google and facebook knows your location because you have a google/facebook app in your mobile. It is easy to know where you…

> you opened a web page with a facebook's like button and facebook analyzed your browse history

How could facebook (or any website) access your browsing history? they know what link you access from their pages, but apart from that, can they get any info from the browser?

Re: Ask HN: How was this ad targeted to me?

#43
post #33

Earlier quoted context omitted.

Ironically, that's the only good tech employer in France :D

I wonder if the only action against them is sending them so much traffic their servers can't keep up. I feel with the advent of internet of shit, this will start becoming more of commonplace

They likely have billions dollars in infrastructure, you're not gonna DDoS them.

They are the one DDoSing you with ads.

Re: Ask HN: How was this ad targeted to me?

#44

The answer is cookies. Facebook sets multiple cookies on your browser that do not expire and are not deleted when you logout. By logging in at work and home, you are making it trivial for them to track you. They also set this cookie when you intract with a Facebook like, share, comment or use Facebook to log-in to a third-party site. A few suggestions to help mitigate this: - Use a browser dedicated to all your socia…

> The answer is cookies. Facebook sets multiple cookies on your browser that do not expire and are not deleted when you logout. By logging in at work and home, you are making it trivial for them to track you.

I don't understand how cookies could explain the scenario described in the question. Can you explain?

Re: Ask HN: How was this ad targeted to me?

#45

Facebook doesn't need to be open in a tab for it to know it was you on that site, and you don't even need to be signed in. You and your computers are connected, even if you think you are careful. If you have ever signed into FB from home, they know that machine / ip / whatever fingerprint is you. Even after you sign out, its still out. Even if you are in ingocnito mode, its still probably you. Then you sign in to FB…

as someone who used to work for a targeted advertising co i can confirm that, overall, this is pretty accurate. And, nearly a decade ago we were doing work to connect fingerprint x and fingerprint y when they were actually the same person (usually on different computers or maybe in incognito). Conceptually it wasn't hard. People tend behave the same way regardless of what computer they're on. I'd be VERY surprised to…

I work on ads at Google. As far as I know we don't connect users who are not logged in out of piracy concern.

Re: Ask HN: How was this ad targeted to me?

#46

Earlier quoted context omitted.

as someone who used to work for a targeted advertising co i can confirm that, overall, this is pretty accurate. And, nearly a decade ago we were doing work to connect fingerprint x and fingerprint y when they were actually the same person (usually on different computers or maybe in incognito). Conceptually it wasn't hard. People tend behave the same way regardless of what computer they're on. I'd be VERY surprised to…

I work on ads at Google. As far as I know we don't connect users who are not logged in out of piracy concern.

Those pirates can be quite vengeful!

Re: Ask HN: How was this ad targeted to me?

#47
post #36

Earlier quoted context omitted.

How is it OK to do this if the browser is sending DNT? Is it really voluntary on the part of the ad network and they can just choose to ignore it?

Yes, DNT is an effort by the industry to self-regulate. If too many companies ignore it, it's much more likely that they will be regulated "externally" (by Congress, FTC, FCC etc).

[deleted]

Re: Ask HN: How was this ad targeted to me?

#48

Earlier quoted context omitted.

as someone who used to work for a targeted advertising co i can confirm that, overall, this is pretty accurate. And, nearly a decade ago we were doing work to connect fingerprint x and fingerprint y when they were actually the same person (usually on different computers or maybe in incognito). Conceptually it wasn't hard. People tend behave the same way regardless of what computer they're on. I'd be VERY surprised to…

I work on ads at Google. As far as I know we don't connect users who are not logged in out of piracy concern.

From people I've talked to at Facebook, they are much less concerned about similar privacy issues.

Re: Ask HN: How was this ad targeted to me?

#49

You can (or at least could) absolutely target individuals with Facebook ads. Check out this prank: https://ghostinfluence.com/the-ultimate-retaliation-pranking...

I can't decide whether to share this with my friends or keep this in my back pocket...

Re: Ask HN: How was this ad targeted to me?

#50
post #29

There are so many ways: - you opened a web page with a facebook's like button and facebook analyzed your browse history. If you browse for something in google shopping you might want to buy it, so facebook added it to your interests and showed an ad later to you. (Probably this was the cause) - google and facebook knows your location because you have a google/facebook app in your mobile. It is easy to know where you…

> you opened a web page with a facebook's like button and facebook analyzed your browse history How could facebook (or any website) access your browsing history? they know what link you access from their pages, but apart from that, can they get any info from the browser?

More like 80% of the web pages you opened included the Facebook Like button, so they have 80% of your browsing history right there.
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