I don't think telling others what to do is a great idea. And I agree, such a list is subjective. There's another thread. A few shoppers hate them. I love them. Not going to debate that here....just saying.
However, giving the facts is something else.
Did a shop for XYZ company on DATE. Did not get paid because they pulled the shop 3 hours after I completed it.
Did a shop for XYZ company on DATE. Did not get paid for X months. Had to make X phone calls and/or send X emails.
Did a shop for XYZ company. Editor asked me X questions, all of which were answered. Still got dings $X.
Etc.
If a few shoppers say they were not paid because....maybe it is the shopper.
If enough shoppers say they were not paid because...maybe it is the MSC and other shoppers should beware.