With my actual lawyer hat on, I'll place my bet on the other side -
This is not a non-compete, and these clauses are quite commonplace in almost all placement agencies (IE nannies, employees, etc). Charging a fee to facilitate two people meeting and making a transaction is perfectly normal, and I'm not aware of any court striking them down. In fact, the opposite - i'm aware of plenty of court cases of employers recovering placement fees, etc, from employees, for example.
The only prohibition i'm aware of in california is payment of fees to unlicensed real estate agents for things licensed real estate agents would normally do.
The only interesting restriction you will find on recovery is whether the agency (wag here) was compliant with relveant licensing/etc statutes, and whether the two people actually met using wag.
If they did, ...
Folks are welcome to meet through other means, and it does not restrict anyone working for anyone.