I'm not an expert by any means, but if the Commons Clause's FAQ is accurate, the copyright holder is only retaining a very specific right to commercial use, not all rights to commercial use:

"Commons Clause only forbids you from “selling” the Commons Clause software itself. You may develop on top of Commons Clause licensed software...and you may embed and redistribute Commons Clause software in a larger product, and you may distribute and even “sell” (which includes offering as a commercial SaaS service) your product...You just can’t sell a product that consists in substance of the Commons Clause software and does not add value."

I see how that restricts my rights as a user, but those are rights I simply don't care about. Back in the days of dialup, people were able to make a few bucks by selling Linux CDs to help other users get started. But what examples are there today of unmodified free software being sold by someone other than the primary developer, aside from various app store scams?