I don't think so.
I was at Joann's getting a few solid prints to finish up some mug rugs and what did I see in their solids section? A whole entire section of various colors called "Kona Cotton Solids". I immediately checked the label on the bolt of fabric and of course "Robert Kaufman" appears nowhere on the label. They are also 6.99/yard! That's more than real Kona Cotton costs at my local fabric shop.
Is that allowed? I am pretty sure that Kona Cotton isn't a type of fabric like, for example, Cotton Velveteen. I know that Robert Kaufman has Kona trademarked. Tula Pink went through a huge ordeal with Wal-mart a while back and had to get lawyers and a ton of people involved.
I am not sure what the rules are, but at 6.99/yard for a SOLID, there is no way I am buying it when I can get the real Kona cheaper and support my local fabric shop.
Has anyone else discovered this too?