I don't make what MF makes, but the money I DO make is mostly from bonuses. I might have to take an 800 mile route to the boonies, but the money is there. I drive those two-lane roads very, very happily! I've lived where it took one and a half hours to drive 13 miles to a shop; here, in one and a half hours, I'm 90 miles down the road. It makes a HUGE difference, because the companies I worked for would NOT pay a bonus on that 13 mile away shop, so it just wasn't worth doing. And a "route" in a metro area never ever worked for me. It doesn't, if the shops are 3-7 miles apart but honestly, it takes close to an hour to drive that 3-7 miles. Then, OMG, find parking, too! In a metro area, base pay just wasn't enough to motivate me to leave my house!
I generally complete between 15-30 shops a month. When I do a route, I plan on 3 days "off" after, to recuperate (I'm old, and disabled). So I normally work maybe 10 days a month.
I do accept filler shops (get some gas, take 2 quick photos, leave; prep a package, take a photo of it, mail it, and leave, etc, etc.) IF I am literally driving right by them.