The original comment says "sell them to «resale» companies". Selling goods means being paid for it, while you and the parent comment are both saying money goes in the opposite direction.

This particular thread of the argument can go on for a while. I can't well articulate the doubts I have because I'm not in the industry, but many such well-meaning laws have a tendency to backfire once given enough time for bad/poor actors to game it.

When you negotiate the price to ”sell” at, it’s perfectly legitimate for that price to be negative.