the parallel world of FPS esports started with quake and was going strong for a good decade or so, before being ripped apart by mumorpegers, dotas, counterstrikes and, primarily, consoles (which I believe also ultimately killed starcraft and RTS in general, too).

There is, I think, a reasonable distinction between the semi-annual "tournament with prize money" situation that existed in america with quake and friends, and the constant, episodic nature of the broodwar scene in korea. Players being salaried is a pretty major shift in how the culture works.