The system does require of growth of capital. I think that you are miscalculating the growth necessary because you are not taking the taxation into account.

There is a lot of game theory involved. If no one puts another penny after today, then investors will see diminished returns as sell pressure will outweigh buy pressure.

However, as the price of Drip goes down, it can draw in more buyers and reinvestment from players already involved.

Every investment requires more people to buy in than sell in order to go up in value and remain sustainable. Drip is no different from any of them.

As far as performance, crypto is volatile. If you purchased a week and a half ago and didn't deposit in the Faucet, you would have doubled the value of your investment.

The risks involved with this investment may not be right for you. However, before calling it a Ponzi, I'd encourage you to consider other investments and ask if they also require more buyers than sellers investing in order to maintain their value.