They send very little gas (much less than agreed upon) through NS1 to send a message and try to force-open NS2, which leads to very high spot prices
How this "message" of yours reach Netherlands?
Whatever is coming, price is defined in Netherlands, look for Dutch TTF futures.
It is like price of oil - Brent futures minus some discount
> which leads to very high spot prices
Russian gas itself is not traded on spot place(s). It is long term contract, but price follow dutch futures. How this "price gouging" is done, could you describe mechanism?