Microsoft in 2016 was $51, $127 now
Facebook was $97, $189 now
We're not even talking about rocket-ship growth here. We are talking about option strike prices losing money in one of the most favorable economic time periods where massive, healthy public business did have monstrous growth.
I would have at least expected price parity with other large companies - even that assumption would have been wrong.
Still, Uber employees will be happy that they can finally sell those RSU awards (in six months when the lockup expires).
Taking these numbers at face value, I can't know if they account for it.
Uber most definitely grew over the last three years.
Over the past 3 years:
FB is up 60%
AAPL is up 98%
AMZN is up 261%
NFLX is up 363%
GOOG is up 60%
Uber was also somewhat unique among unicorns in uniformly blocking its employees from selling shares on the secondary markets.
As someone who does work in the space, no, most companies permit transfers. There are mechanisms in place to reasonably limit them, e.g. rights of first refusal and transfer fees. But Uber was unique in the degree to which they restricted transfers.