I used to do mystery shops at the Cheesecake Factory until MysterGuest went out of business. Boy, do I miss my free monthly meals there. This were easy direct reports.
Coyle has great shops, but they take your guts out writing the evaluations. One dinner took me 4 (sorry four as they want the number written out) back and forth editings from them before it was accepted. Not worth the effort.
I have been getting paid to have my oil changed for the past 3 years with Bestmark. Since I use synthetic that's $75 plus the $40 for my time. Just wish they had more restaurant shops near me.