GitHub blocks FLoC across all of GitHub Pages
The internet is split roughly into 3. The top 100 websites get a third of the page views, the remaining top 10k get another third and millions of websites get the last third.The top 100 have dedicated engineering and policy teams teams that will disable FLoC because they're either not interested in ads (Wikipedia) or have their own first party implementation that doesn't need FLoC (Facebook). They'll ditch FLoC.The next 10k might have engineering teams that can make the change, but might be more interested in finding out about their audience so they can monetize more easily. They'll keep FLoC.As for the remaining millions, only a tiny minority of them will even know this is a thing, let alone care enough to make the change or contact a developer who can do it. These are the folks who have hosted their wordpress site with GoDaddy because it was cheap and quick when they needed a site. They'll keep FLoC.So the upshot is that github.com, instagram.com and amazon.com might opt out, but the vast majority of the web will not. Me prediction is that at least half of all web pages loaded by users won't have this header.