"We lose a little money on every customer, but we make it up on volume." :-) I think in Amazon's case it was just experimentation with a sunk cost. Based on th

"We lose a little money on every customer, but we make it up on volume." :-) I think in Amazon's case it was just experimentation with a sunk cost. Based on the discussion above it looks like it's impossible to form a company to sell these to turn a profit, at least in the dash button form.