That they purchased his product makes sense, because that's how he heard about it. His product acts like a funnel for such stories. However, I agree it's a lit

That they purchased his product makes sense, because that's how he heard about it. His product acts like a funnel for such stories. However, I agree it's a little too conveniently self-serving. Although an appealingly elegant coincidence, it's important to not only be neutral, but also to appear to be neutral.