I hadn't until recently. Tried to do a "mystery" gas shop, with required (six) photos, but turned out it was full serve, tiny and slamming busy. I initially tried to attempt (in an unrevealing way lol), but it was impossible.
I do not do reveal shops and I immediately emailed the scheduler from my phone. Blah, Blah, Blah, long story short, the shop was removed, but not without hefty "comments". After speaking (typing) with other posters here, I'm not the only one who had that problem.
Before that issue, I had only performed a handful of shops for Ritter and never experienced an issue with schedulers, editors or payment.