On the other hand Equity is startup is completely different thing and should be heavily discounted.
That's not the way Amazon vests your stock, unless things have drastically changed recently. They vest in single lump sums for the year, and they have a slowly ramping up vesting schedule.
First year, nothing (but they give you straight money bonus) Second year, barely anything, but they give you some cash to "offset". Third year, good bunch of the stock, but still less than half. Fourth year, all the rest of the stock vests.
Within each year you should get some stock offering, on the same ramping up basis so the idea is after the fourth year, you have consistent RSUs vesting, and they'll probably be split over the year based on whenever Amazon gave you the stock offering.
For very few companies. Most companies - even tech companies have annual vesting (so 25% every year). And Amazon has 5% vesting after the first year.
But it still should be modeled far above zero, and far closer to cash than pre-ipo options.