I don't understand how easy it could be to Google around a bit and find companies offering this service, but its seemingly impossible to stop at scale.
Employ a group of people to go undercover with these firms, who are purposefully violating your platforms TOS, and enact draconian measures against the brands your employees encounter.
This is ridiculously obvious when searching for basically anything on Amazon now. There will be 10 identical product listings with 10 different brand names, many of which have reviews describing, and pictures showing, completely different products.
Employ a group of people to go undercover with these firms, who are purposefully violating your platforms TOS, and enact draconian measures against the brands your employees encounter.
The risk would quickly not be worth the reward.