They are already paying the price: hydrocarbons are mostly gone as a source of income; besides they cannot even spend that income due to sanctions. And yet they continue the "hybrid war". I'm on your side, but I'm also realistic.
last time i read, lower volume was offset by higher prices and russia stood to increase both their export earnings and their domestic stockpile
The fewer buyers you have, the less flexible you can be with you prices.
Higher prices on the open market yes, but not enough to offset the volume loss. A good chunk of new volume is sold to China, which buys at staggering discounts (as high as 50% over market rates).