Earlier quoted context omitted.
On the other hand, I did pay the $1 for Whatsapp back in the day and I was promised it'd be ad free. Want that $1 back, I actually even deleted my account and uninstalled Whatsapp!
I feel a bit for Brian Acton - iirc he refused to sell because the 500M users paying $500M dollars was more than enough to fund his tiny team (of 30?), but when the offer went up to 19B$ it's just kind of hard to turn down - there's extreme opportunity cost there. Most people would sell before that, 19B$ of principle is quite a lot. I think it's just if you're empire building - and Zuck is insanely good at this, one…
There's no way they actually earned $500M/year. Even if Whatsapp had 100 employees making $200k/year on average, that's $20M on salaries. Add an another very generous $80M on infra/admin etc costs and they'd have been making $400M profit. With that much profit achieved within such a short period, in the QE funny money era they could have IPO'd at $50-100 billion easily.