Isn't Netflix's compensation to employees all cash?

Usually in the early stage (when stock has no value) people get more stock. Then in the growth times people get more cash. And then when the growth slows down and one succeeded at becoming another boring behemoth people get stock again because it increases market activity for an otherwise boring stock. So I would assume that most Netflix people currently report a higher amount of cash bonuses, while the internal policy slowly shifts to more stock.

You get the option to invest any portion of your salary in NFLX stock options.

Do you mean pre-tax?

hmm, I don't think it is pre-tax. May be some NFLX employee can confirm.

Then it doesn't seem like a great perk, I can trade my post-tax salary for NFLX stock too...

No, I actually read an article saied that, you can choose how much do you want to stick your profit to the company, AKA, you can choose how many proportion do you want to get paied by cach or stock.

It is wrong and it is very unlikely that you read it in an article, since it is not a secret. There are no stocks, it is all cash for everybody, at least below the C-suite. You can use up to 100% of your salary to buy stock options at 40% of current value. The options are delivered each month and vest immediately.

There is a huge difference between shares and stock options.

if someone invests 100% of their salary in NFLX, do they get a better performance review?

There are no performance reviews at Netflix.

No I know some who got stock options.

Or maybe it's not as bad, just that now that they're very big, lot of SJW get through the doors and cry their ways to promotions.