The value he is providing is a booking service, dealing with complaints, etc, no more, no less. Turns out lots of people value that quite a lot; almost as much as the cleaning itself.
I don't think you can really argue that this adds no value to the transactions - he is finding these cleaners more work than they would otherwise have had.
Value as I see it:
Clients Book and pay online
We show up on time
We follow up after cleanings so clients rate the team
We deliver wine with each cleaning
We provide ridiculous customer service
We have a 200% guarantee that we actually honor
We simplify the price structure (cost is tied to number of bedrooms, that's it), no need to come out and do quotes
and more. It's a lot more than just, hey you make X, I'll charge X+$45 and we'll all be happy. I had to build entire systems around delivering top notch service to justify raising our pricing points and creating premium experiences for the client.
I don't think you can really argue that this adds no value to the transactions - he is finding these cleaners more work than they would otherwise have had.