ordinary pyramid Scam
You are right, the project of Multi.today pyramid, this is a HYIP project, but this does not mean that you want to cheat, I know many people who earn on HYIP projects in time investing in them.
You need to realize that investing in the pyramid is an increased risk, but if you approach this business wisely, you can make good money.
Absolutely any investment is a risk, regardless of the pyramid or not. An experienced investor is aware of all the risks.