> "Let us know which of these categories apply to you, so we can tailor your browsing to your interests"
This prompt will never happen. The last thing Google wants is any additional association between their brand and advertising.
Google's mode of operation has always been to sneak in the back door and count how many boxes of cereal you have while you are looking at underwear. Knocking on the front door and to ask if they can come in would likely never occur to them.
There is no mention of Chrome being an ad supported product anywhere when you install it. They want that association completely out of people's heads.
This is a misunderstanding of what these cohorts are. If you read the [FLEDGE readme](https://github.com/WICG/turtledove/blob/master/FLEDGE.md) you can see that there are multiple types of owners of cohorts that fall into 3 categories:
1. Advertisers - who would add you to a cohort they own, so say "Nike - womens-running-shoes"
2. Publishers - who'd want these cohorts to better allow for advertisers to advertiser on their site, so "NYTimes - business-section-reader"
3. Third party ad-tech companies looking to create audiences for advertisers who work with them, so "Example Agency - mens-formal-wear". They'd partner with publishers so that when you go to somewhere like GQ or Man of Many and read an article on tuxedos then you'd get added to the cohort.
So you are right, you'd never see a prompt to add in your interests, but this isn't because Google doesn't want to associate with specific brands, it's that Google isn't necessarily an owner of a cohort (though they totally could create their own under any 3 of those categories).
This prompt will never happen. The last thing Google wants is any additional association between their brand and advertising.
Google's mode of operation has always been to sneak in the back door and count how many boxes of cereal you have while you are looking at underwear. Knocking on the front door and to ask if they can come in would likely never occur to them.
There is no mention of Chrome being an ad supported product anywhere when you install it. They want that association completely out of people's heads.