That's pretty average for a WWE house show. Depending on the arena's capacity and city, house shows can range anywhere from 1000-10,000. When Raw, has around 4000 in attendance, then we can talk.
Let's make things clear, I'm not hating on TNA's product or talents. It's just that TNA fans think it could survive with the state it is in. But in reality it's losing a ton of money each year, and sooner or later I see Mr. Carter pulling the plug.