Some quick math...
Dude in article claims to have sold half of his 280 lbs of weed.
140lbs x 16 ox. per pound = 2240 oz.
Article says it sells for 23-25 dollars per gram.
2240 oz. x 28 grams per ounce = 62720 grams total
62720 grams x 23 dollars per gram = 1,442,560.00
Looks like a pretty decent living to me. Perhaps they are taking too long of smoke breaks on the job? :) or they are spending their profits on munchies.