I agree with you that taking somebody else's name or brand is foul play. I the case I was replying to, somebody had copied the code and put their brand on the author's FOSS project.
Which is the same as some very popular software, including the Safari browser, Android, and much more. That's FOSS, if you give it away you have to expect people to take it. Just as you say.
It looked to me, like they actually took his name and brand, as well as his work, and republished it.
I guess it was sort of a "fan art" way, which isn't too bad, but they showed pretty callous disregard for the niceties of copyright, which is pretty important, for the type of work they are advertising.