The service is "best provided by people who have experience doing that thing", be they employees or contractors. There's no value to any one of the three parties (Homejoy, customer, contractor) in the cleaner being an "employee". It's not bad/good; it's just not a factor in this situation. Do I care, as a homeowner, that the person coming from Homejoy is an employee or a contractor? It's likely that I prefer them to be an employee but, if the price is right, I could care less...