The gas was never cheap, either; apart from the money spent now to restrain the military buildup and invasion it financed, even at the height of supplies it was much higher price than China is paying, a price sustained by Russia using military force and more to restrain other (Asian) countries from supplying to Europe.
(This was obvious to everyone, right? A single majority supplier nation state charging a cheap price out of the kindness of their heart? No, of course not; neither cheap nor kind. It was a monopoly, built on blood.)