You've shared an interesting fact on where ponzi term was originated. How sad that it was Charles Ponzi who introduced that kind of act. Though I believe that nowadays, ponzi scheme are widely happening. Many people are still not aware that they are being scammed.
I believe, aside from what Charles did, there are still so many ways how this ponzi scheme being perform. Networking is included on that.
Whatever form or shape it is, Ponzi scheme is just a way to scammed people of their hard earn money. Others may call it Pyramiding or Networking but the output or the goal is the same. Recruit as many people as you can, entice them to invest lots of money and sign under you.
As I have said, this has been practiced before until Ponzi gave it a name, so just be careful and never blindly trust someone, specially if it involves investment and huge amount of money.