Airbnb’s business model has drawn both positive and negative critiques. Customers can often save money by staying in a private home rather than a hotel, but some in government have expressed displeasure that Airbnb hosts do not pay hotel taxes. But here’s another, very local wrinkle — a recent Airbnb television ad features a Jamaica Plain resident who says that, because she’s an Airbnb host, she can afford to stay in her home.