This was slid off the first page of HN so quickly.
As someone wisely pointed out in this thread, the reason Facebook is doing this is: "it's for favor trading and leverage at the highest levels."
Just came here after seeing it in the Guardian and really disappointed it's not on the front page. Telling.
It set off the flamewar detector, which is the usual reason that happens.
We'll either turn off that software penalty or merge the thread into a submission of the original Bloomberg source - these things take a bit of time to sort through!
Edit: thread merged from https://news.ycombinator.com/item?id=46836487 now.