Well this is nothing new. Ponzi scheme know quite well no one sane enough to invest directly in them so they have to be creative to make layers of legitimate or popular platform to lure people in. No matter what claim they are telling you, ponzi = scam and you should stay away.
I think this type of ponzi is something new
Because their audience are lured in using etherum blockchain which is not leaving crypto currency in the spotlight.
The only etherum investment is when you buy and keep your tokens in your cold storage or paper wallet
They will use the old methods to trick people but with the new form to attract people, especially for new people who don't have more information about investing. That will be a good target to them as they will get trick by making money fast offers.
Besides ethereum investment, you have bitcoin investment by holding your bitcoin tight and don't sell your bitcoin if the price does not increase so high. If you can do that, you will make a lot of money from the investment, but yes, we need to be patient and wait for a long time before the price increases.