[nalaz]

I’ve never seen these. I don’t know if it’s because I disable third party cookies, because I never log into Google using my main browser profile, or because of my ad blocker.

[jonas-w]

You need third party cookies activated, you need to be logged in currently with your google account and have adblocker disabled. As you don't have any these, you don't see them.

[NaughtyShiba]

Furthermore - there’s not much sites with those.

And I know from experience because I had to add one on our site at my previous company, back when it was still beta-invite-only.