yes, this is a ponzi scheme and eventually become a scam. It's the run-of-the-mill Ponzi scheme using Ethereum, or in the case of the earlier ones that were already busted, Bitcoin, as the 'product' they are selling.most of these people involved in propagating the program are not aware it is a Ponzi scheme and are victims as well. it’s your choice if you want to invest or not. If you’re willing to take the risk that goes with it.
Like any other blockchain-based smart contract scheme you know out there, Forsage cannot recruit the whole world. When it reaches that point where it can no longer recruit partners, then it will end its operations.