You remember those old “In Soviet Russia” backwards jokes? It’s like that, but unironically.
Putin has consolidated power to the point that he doesn’t serve at the behest of Russian billionaires; they only exist due to his whims - and they can cease to exist just as quickly.
‘Blowout’ by Rachel Maddow touches on this, it’s an interesting read/listen.
Have the same question, but hazarding a guess - the rule of thumb would be using the bottom of the cells as guide?