I'm ware of amway, and many other similar mlm/network marketing schemes like sky biz, gold quest, etc. They were all pyramid schemes in the purest form, selling mostly overpriced garbage (although they posed excellent presentation and sales skills).

This video should clarify your concerns about why we are still not at the saturation point for Bitcoin:

http://www.youtube.com/watch?v=qHUPPYzzZrI