I think it was Cirrus that deactivated me the first month after I started mystery shopping because I followed the instructions and the report was unfavorable. The editor told me to change it and I refused, because I had followed the instructions and reported the truth. Here I am several years later and I think I would probably still report it the same way, but I may have been smarter during the shop, but I'm not sure it would have changed the outcome.
I get not wanting to work for Ardent, they were nice in the beginning, but they will let you burn yourself out and make yourself sick, then toss you out like old socks, rather than let you have a few weeks to recoup.
I understand Intellishop too. I did enjoy working for them most of the time, and they pay pretty quickly. But if there is a problem, any problem, no one will respond to you. And none of the phone numbers worked to try to reach someone directly. But all things being equal, I would work for them again if the opportunity were to present itself.
My average score is low on Service Sleuth because of snarky editors. And because their instructions are vague and sometimes difficult to understand. I've eaten a few shops for them because I was not willing to drive several hours to go back and re-do something that made me uncomfortable the first time I did it. I haven't worked for them in a while, and I don't seek them out.
I have to say though, that there are very few companies that I will just refuse to work for. For the right pay, or for a scheduler that I like I'll do what they ask just for the continued goodwill.