I’d agree. In theory, there are many legitimate reasons to “sell” FOSS software. If I was putting it on a DVD, labelling, and mailing FOSS software my time and materials certainly deserve to be rewarded. Likewise, listing it on closed store like the MS store but keeping it updated from sources might make it easier for people embedded in the MS ecosystem to keep up to date.
I would expect legitimate repackagers/redistributors to be open that the software itself is freely available though. Besides I fear the well is poisoned by hustlers trying to sell something free for cheap to make a quick buck.