Hi,
I am not very familiar with your general topics, but some friends of me invested money at:
www.defigroups.com. They offer 10-17% profit per month.
Your friends got scammed. 10-17% is "a too good to be true" deal even for a DeFi
You got it right, which means that the team is fake as well. Scammers usually do such a thing.
The used adress: Chemin des Limites 1A, 1293 Bellevue, Switzerland just shows a closed company with the name of Defi Swiss, Odeski, Grinberg & Co. The owner of the company: Frééeric Ruiz looks more like a misspelling than a real person.
That address might be fake too. Your friends should first do some investigations next time before sending money to such scam projects.