I have done a couple. I love working with Mintel. They pay well. I could see as how some might be uncomfortable with sharing the various about their credit scores. It doesn't really bother me. But it is clear they will know where you stand. If any shop is out of your comfort zone, don't do it. There are some shops that I love, and others that I don't touch.
How many legs does a dog have if you call the tail a leg?
"Four. Calling a tail a leg doesn't make it a leg."
-- Abraham Lincoln