"American cash crop" is a little misleading (implies that its a substantial amount) when the article cites 3.5kg and 360g of harvests of saffron from American farms. Iran produced 174 tonnes, for comparison.
Also, to be pedantic, 3.5kg was from one American farm, not "from American farms".
I'm intrigued by the harvesting technique. Mostly because it looks like an interesting problem you might be able to work on with robotics.