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A comment on I spent a week without IPv4 to understand IPv6 transition mechanisms. Parent comment

Re:I spent a week without IPv4 to understand IPv6 transition... by josephg on Monday March 06, 2023 @06:31PM (#35049380)
I have multiple computers in the house, mostly not logged in to Google. YouTube recommendations spill between devices all the time - like, if I watch a video on one device, I’ll see the same video recommended on another. Or if my partner watches something, YouTube will recommend it to me.

They’re obviously doing recommendations based on IP address. (And this is purely over ipv4).

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Re:I spent a week without IPv4 to understand IPv6 transition... by throw0101c on Monday March 06, 2023 @07:35PM (#35049945)
> They’re obviously doing recommendations based on IP address. (And this is purely over ipv4).

I have IPv6 at home and connect to Youtube over IPv6 (that's generally the default behaviour on macOS and many other OSes). I reboot my DSL modem-router every night and get a new IPv4 address and new IPv6 prefix every day.

Now: I live in Ontario, and my ISP is based in Ontario, but they serve clients in Quebec. Every so often, when surfing Youtube, I get served ads in French because according to my (IPv6) address I am "in" Quebec.

And, while I am not logged into any Google service, I do not block cookies. So even with cookies, Youtube seems to be fairly dumb about serving ads correctly just based on IP addresses (or at least IPv6 addresses and/or IPv6 prefixes), since cookies don't seem to be useful.

So I'm not quite sure about what people are talking about when they say "IPv6 tracking" if even Google/Youtube can't get their act together.

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Re:I spent a week without IPv4 to understand IPv6 transition... by zeristor on Tuesday March 07, 2023 @04:00AM (#35053211)
I live just outside London and have been wondering why I’ve been getting ads from More4 for Wales and Cardiff.

Iechyd Da!

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Re:I spent a week without IPv4 to understand IPv6 transition... by Springtime on Monday March 06, 2023 @09:10PM (#35050635)
> They’re obviously doing recommendations based on IP address

eBay uses IPs showing content, too. I see 'items you've viewed recently' show items I've never looked at, since when on a mobile connection my IP changes fairly frequently and eBay carries over the recently viewed state from whoever else was previously using that IP.

It had puzzled me until I came across this[1] eBay topic where others had experienced this, from shared offices to spouses, etc.

[1] https://community.ebay.com/t5/Share-eBay-Technical-Issues/Re...

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