I should point out that as was mentioned, there's tons of prefab models for 3dsMax and highend apps too. So what's the differece? Well, it's my understanding that some even frown upon using other people's models regardless of what program they are made for. Be it Poser, Max, or whatever. But from their point of view, using background models like a bed to suppliment an environment for a hand-made character isn't as bad as using a stock character itself as well as a stock environment, and that's where the prejudice comes in. So many people use Koz's hair for example, or SteffyZZ's textures that it's hard for someone trying to stand out as a unique "artist" to do so using models or textures made by others.