Per hour per hour? Ok, let's see...second-order integral (these always confuse me because rates are stepping up a dimension but derivatives are stepping down a dimension, but that's neither here nor there), assuming no constants, so they start at 0$/h and there's no sign up bonus...

Got it. After one day, they've made $3423.33 A week gets them over two million dollars, putting a solid, but not insurmountable, dent in the transportation budget. A month over five-hundred million, easily bankrupting most midsized towns. After a year they've made almost half the entirety of the US GDP.

Maybe I should become a bus driver.