As some others have pointed out, a "Ponzi scheme", by definition, requires initial monetary investment, which is then used to pay the first investors, so those entering last are burned. No initial investment, other than a little typing was required. If you're going to call DO a scam, at least be more accurate.
This is not true. You need to own coins to get anything from "a little typing". So it's a ponzi with extra work involved for those who are being ripped off.
We're speaking at cross-purposes. When the airdrop first started, no initial investment, as I said, was needed. The coin wasn't even on an exchange, and couldn't be purchased, so again, it doesn't follow the definition of a Ponzi. If you participated, you received some Onion, and it was only much, much later that the holding rule was removed. The team literally gave the crypto away based on the rules laid out in the original signature campaign. As I said, it was "just a little typing". You could not buy Onion in the beginning even if you had wanted to do so.
Time is money. A little typing is not free. And you very well could buy Onions. They were also mineable and had a ridiculous amount of hash rate dedicated to them from the very moment they became available, which implies collusion. Everything about this is fishy and since the moment the rules changed it turned from shady to outright ponzi.