If by "unusually large scale" you mean for FAANG-scale companies, no. It's probably pretty much in line with other global-scale companies. Which is to say: At one point, Google owned 30% of all long-haul fiber runs in the world. I doubt they're at that number anymore, but it's not because they've sold them off. I would not be surprised if Facebook owned only a tiny fraction of that, but even if they own 1% of the world's fiber runs, it's worth them having their own specialized subsidiary.