Odd that Amazon is all "yellow", Facebook is all "red", yet they're both grade E. Not what I expected!
I was also randomly enrolled on tosdr.org's re-design experiment, and when I tried to click "opt-out" (I prefer the old design), it says "page not found"!
It appears that the individual items are color-coded. If you click through to https://tosdr.org/en/service/182, then you can see that Facebook has plenty of yellow items too.
When I read the items that are listed for Facebook, they do seem to comfortably warrant that red.
I was also randomly enrolled on tosdr.org's re-design experiment, and when I tried to click "opt-out" (I prefer the old design), it says "page not found"!