As I used to tell people about why I was selling my options at [some other name brand company] as fast as they vested, choosing to work for the company is an investment. A huge one. And since I was far more likely to be laid off if the stock tanks, owning shares and working there was not diversifying my assets.
It’s the only time I made money on stock options and most of what I earned I earned by... profit taking on shares of a different company that enjoyed two stock splits before our stock started to crater.
When that behavior ends, if Amazon doesn't adjust my comp, I can go to some other tech company, while still having one of the best names you can have on a resume (although, Google would have been arguably better in that case). Furthermore, if we consider my stock gains as part of my annual comp, it gives me a vastly better bargaining position.
Still blowing smoke?
Yes, you're not correctly understanding that you depended on a gamble to outperform the Google offer. That same gamble you could have explicitly made in the stock market while taking the Google offer and capturing the upside of the Amazon stock.
Remember, predicting that a stock goes up is just as lucrative for an outsider as it is an insider. Never make a stock prediction part of your evaluation of a job offer because there are plenty of financial instruments to allow you the same upside as an outsider.