Much more likely to be a reference to Brunner's classic work of dystopian fiction, which postulates that the 2010 population of Earth, projected to be around 7 billion people, could all stand shoulder to shoulder on a single island the size of Zanzibar.
Well, that was unexpected. I would have gone with Stand on Zanzibar as the other poster mentioned. Also makes me feel old that they don't remember the spice channel...
https://en.wikipedia.org/wiki/Stand_on_Zanzibar
It's not the kind of literary allusion I'd want to make, if I were a global multinational like Google/Alphabet, but there it is.