They require a lot of pics for the pay. The ones in my area (I am seeing 9 in a 50 mile radius) are at $15 right now. The store closest to me, which is only a few miles away, is difficult to capture the pics, so I let it sit for another shopper to grab.
There is a location about 13 miles from me, and they are part of the "Special Project" with a reimbursement of $6 and pay of $15, far less pics. I normally scoop that one up if I'm headed that direction. If it goes to $20, I'll usually try to find something else in that direction to make a mini route.