I would guess the response surface is a function of wholesale cost, profit margin, and previous year's losses (or current theft).
So something that is frequently stolen and has a high wholesale cost and/or low margin will be locked up first. Toothbrushes are easy to conceal and likely have a low margin so lock them up.
Something else might sell for more, but has a higher margin or lower loss rate. You might lose one, but selling another 5 makes up for the loss.
It has to cost less to install an expensive cage and pay for the labor to open it up everytime a customer wants something from it than losing the item to theft.
If they can cut off Russian rail supply into occupied Ukraine, then a lot. If they can cut off Russian natural gas exports, then a lot. If they're just there for the sake of being there, then nothing.
Arr, matey, I'm here to pillage your booty