And the debate goes on!
I'd like to see this resolved one way or the other. Not so much about "logo" fabric but using fabric at all.
There's a somewhat popular designer (who I'm not going to name) who made very public and very ugly threats about a photo of a finished item on the cover of a book that (horrors!) had some of her fabric in it which wasn't credited. I flat out won't buy any of her fabric.
Think of it this way: I made our DGD a log cabin quilt with over 140 different fabrics in light/dark pinks. What if someone wanted to put it on the cover of a book: since most of those fabrics were FQs, I don't have a clue who they came from.
Could one of those designers sue me for using a bit of her fabric without permission?
Ridiculous in my opinion.
I wish a really rich quiltmaker would be threatened with such a lawsuit and take it to court for a final opinion.