[dataflow]

Why would the cohort membership change frequently? Isn't it based on your browsing habits? I don't think my habits change frequently—do most people's?

Also, even if I take for granted that everyone's cohort changes daily, how does that imply anonymity? Like say my habit is that I check emails a ton on Monday, go on YouTube on Saturday, read the news on Sunday, etc... so my habits are changing daily, okay, but not weekly, right? Or maybe I do them in a different order on another week, but I'm not going to develop 1000 different habits across 1000 days, right? Shouldn't some kind of frequency analysis provide fairly consistent results?

[draz]

Cohorts cannot be too small (or they are not published), nor too big (or they are not particularly useful for capturing a particular set of behaviors/interests). The algorithm will balance these two constraints which will lead to any individuals coming in and out of particular cohorts. The semantic meaning of a cohort will likely change over time as well. For that, FLoC is proposing adding version IDs

[dataflow]

This is useful to know, but I'm confused how this addresses what I wrote in the above comment? It wasn't relying on cohort size being small or large.

[draz]

“Why would the cohort membership change frequently? Isn't it based on your browsing habits?” -> cohorts need to be rebalanced over time, so your cohort membership could change.