[dredmorbius]

The platform was called "Google+". The feature was called "Circles".

[amarant]

Really? Huh.... Memory is a fickle thing, isn't it?

[dredmorbius]

There is Dave Eggers's book (and film adaptation) The Circle, which I understood as largely commentary on Google rather than other tech firms, though it's also described as an amalgam of several others. That might be steering your fickle memory ;-)

<https://en.wikipedia.org/wiki/The_Circle_(Eggers_novel)#Film...>