It's funny because browsing (original) Orkut was the first time I became aware of just how bad the nascent white nationalist movement was becoming, because while browsing around there I stumbled across several very active white nationalist and NAZI-type groups. Most in Portugese, but some in English.
I also vageuly remember when Orkut & friends were working on "Hello.com" while still at Google sometime I think around 2012 or 2013?, running sort of hush hush in parallel to G+, with assets checked into Google3 (the monorepo) and people being like "what is this? Do you know about this, Larry" because it seemed to go against the messaging we were getting about G+ being the unified social platform, we were all being forced to pivot to etc.
And then there was a bit of a minor scandal and memegen-storm about a bunch of animated GIF emoji assets that included animations of people slapping women and other things some people found distasteful. I believe after that it all disappeared from Google3.