It seriously depends on the location. The one in my zipcode doesn't use enough cheese and it seems the sauce is sweeter, though I don't know how that is possible if they are a franchise that uses the same products! I also have found that some locations don't let the dough rise long enough, which makes for a tough, denser crust. If they let it rise too long, it is doughy and soggy. There is one location in particular about 10 miles away that always has the best crust, lots of cheese, and has the best sauce. I jump on that one when it becomes available.
Anyway, there are approximately 15 Papa John's within a 30 mile radius of me, and there are at least 3 MS companies who shop some of these locations. It was explained to me by an MS scheduling rep that there are so many locations, not one MS company can handle that big of an account! There is one particular MS company who has been doing them for many years. I have done at least 100 of these shops in the past 10 years for this company, and at first I would do the delivery one for just the pizza reimbursement, but over the years with no rejected photos, I have been able to get bonuses between $15 to $45 per location depending on how far I had to drive (never more than 25 miles one way). Even for the one that delivers to my house I usually get $15. Hint: end of month bonuses. You can usually get them to change it to a carryout. That one company: they like the phone. Don't self-assign, call them and ask for more money. You can negotiate and play hard ball. They will call you back 9 times out of 10 and give you what you want.
There are two other MS companies who started shopping some of the chains in the past year. I will only do them for a bonus, but these other two companies are rarely willing to go over $20 in addition to the pizza reimbursement, which isn't good enough for me since I am not crazy about the pizza (at most of the locations). I hate wasting food, so I ziplock 3 slices per bag, take a case of bottled water, and when I am going on or off the ramp to the Interstate where the panhandlers are hanging out on my way to go do shops or errands, I pass off a bottle of water and some pizza. Hey, I know most of them want money, but sometimes I run into a person who is really hungry and doesn't care if the pizza tastes like cardboard.