My Amway story:
In the late 70's, moved to California with my young wife and son for a job. Three years later moved back home to South Dakota.
A distant friend, one I'd only see rarely when I met up with my good friends, called me up and talked about how he missed me, would like to catch up with he and his wife. I thought it was quite suspicious, for as little I knew about this guy, but my friends were all scattered now, and my wife says it'll be good to have new couples' friends.
So, we invite them over and cook up a meal.
Within minutes of arriving, I get, "So John (not my real name), have you ever thought of bettering yourself, owning a mansion, a yacht, etc." Continues to rattle on while I'm thinking, what's this guy talking about.
Then it hit me, Amway salesman! I looked him in the eye and said, "is this about Amway?" As he nodded and started proclaiming the merits of Amway, I stood up and said GTFO.
That was the day I learned to trust my instincts.