To avoid doing any real math. Assume you get $100 and a targeted appreciation of 15% and the stock appreciated 30%. Then they're going to drop future compensation by $15 to even things out. This may feel unfair but its pretty well stated ahead of time (although who really understands RSUs out of college).
(2018) https://www.teamblind.com/post/BZhGVek5
(2022) https://old.reddit.com/r/FASCAmazon/comments/vdti7y/comment/...
(2024) https://old.reddit.com/r/personalfinance/comments/1d6w01h/am...
There were some comments that Amazon said they'd make people whole in 2023 [1] but the stock is now above it's pre-2023 levels so if they did nothing people are whole.
It may very well be, stock goes down => oversized refresher; stock goes up => undersized refresher.