It's not so much that somebody can make money with it. It's that you, the project maintainer, will be reaping all the monetary benefits for yourself. With open source software theoretically anyone can benefit. If you don't like what the maintainer is doing, you can fork it. In this case, though I believe the commons clause does allow you to fork it, you would still be the one reaping any monetary benefits from the fork.
In my opinion the biggest issue with the commons clause is it no longer makes logical sense to fork the project. If the project dies because you couldn't make any money off it, and you don't go back and relicense your work, the code is practically dead as an 'open source' project. Well, that and that the consulting clause seems to be just sitting there waiting for a major court case to decide what it truly means (even the lawyer who led drafting the clause admitted as such [1]).
[1] https://github.com/fossas/commons-clause/issues/4#issuecomme...
I'm planning on releasing my project under similar terms. I'm not particularly interested in community contributions, but rather for there to be trust in ensuring privacy and security. Sometimes, there isn't a one-size-fits-all with the available OSI licenses and I appreciate what op has done to do his best to find what works well for him and the community.
I can totally understand if a person says "I do not want to contribute code to a project for free when somebody else can make money with it". But then they can not contribute code to any OSI approved Open Source licensed project. Because with that license everybody can make money with it. And very often is that somebody the wrong one (like for example Amazon).
The only difference with the Commons Clause is that now still somebody can make money. But that somebody is now the entity behind the project. And they normally put that money right back into the project (by for example hiring developers) and make so sure that it improves and stays around a long time. So I personally would prefer to contribute code to a project which uses the Commons Clause then one which does not.