"I'd like a list of the vendors that did pull their gifts from this farce of a Trick or Treat give a way(?).  "

Most have not publicly stated that they have pulled products. I know that a couple will have theirs in the regular free stuff and a few on their personal web sites. The only name I recall for sure is Zai who has posted a link over in one of the daz threads about this.

www.Calida3d.com
Daz studio and Poser content creators