Keep in mind that the major drag on profitability for many of these companies is labor/compensation costs and specifically the war for talent that Facebook started in 2011-ish. The 22 year old making $150k all in and their 27 year old boss clearing >$300k? That money doesn't come from thin air. Don't underestimate the degree to which the rank and file talent has benefited from the current ''bubble''. If enough downward pressure is exerted to depress salaries broadly across the board then a lot of these companies will benefit. Note that insofar as part of comp is paid in RSUs then this downward pressure is already being felt as public share prices decline.
Exactly. My only knowledge of Twitter is from a user standpoint, but I've racked my brain for years wondering why Twitter is larger than 100 employees. I can't figure it out.
Spreading risk and blame, pressure from investors to spend the big raise money, the diplomatic roles that become necessary at a certain size, R&D employees. Mostly political reasons, but reasons nonetheless