"With Sony’s God of War games earning over $1 billion on PC alone, Sony’s reported decision to abandon PC is strange."
This number is misleading. God of War + Ragnarok likely sold only around $250 million at best.
Sonys PC sales as a whole I believe has surpassed $1 billion.
With that being said I think not supporting PC is a miscalculated move regardless of the the fear of Steam and Xbox. The money being missed will be way more than staying exclusive. Their market will only shrink.