Who knows what their intention might have been, but it's all relative to be honest. Are you in a max skilled heavy mk2 combat with a heavy mk2 remote repair robot, or in a light bot with starting and t1 gear? Are you killing npcs at a spawn, or doing beacons?
Just to give you an example, JOKE corp a few months ago with 6 mk2 heavy combats and 6 remote reps with nexus support were doing about a million (edit* I think it was 100k not a million) plasma an hour on Hershfield at a place that had 3 spawns and we were also running 3 beacons at a time.
You'd have to ask cir/77 how many millions per hour they were getting with the plasma bomb daisy chain on beta, but they nerfed explosion damage from npcs to other npcs causes them to drop no loot.