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Edit: Was replying to comments too fast, misread what I was replying to.

• mgraczyk 4y ago
  The people paying a fee are not investors. This is like saying the grocery store is a ponzi because customers pay the shop owner, who was an early investor. The people paying a fee do not expect to make a profit off of holding ethereum. (Some of them do, but that's a coincidence in the same way that a shop owner might shop at their own store).