Nah, because there are definitely projects Google started on there. The one OP mentioned is on there, and I remember Google Zeitgeist from back when.
EDIT: Not saying that this is comprehensive, but only five entries reference being acquired from elsewhere in their description.
I’m not arguing that Google should have kept them going.
But I think that it might be fair to say that Google did start a number of projects and then cancel them – even if sensibly – and that for people who start to rely on them, that’s frustrating.
In some cases, like with Google Labs stuff, it was very explicit that anything there was experimental and not something that Google was committing to. If one relied on it, well, that’s kind of their fault.