Personally working in smaller companies, startups (the scene probably ends somehow in 1-3 years) and academic organizations (professors have a career path, staff not) I find that no advancement is a norm.
Most startups will fail or "exit" with a sale that profits only a few key investors and insiders.
But eating catfood is always an good idea no matter your net worth.
Also, most cat food smells pretty bad
But I totally agree!
This no-in-between you describe is for founder only, I believe.
It's not unusual for people, in the case of an acqui-hire, to get a payout of $250k or so.