Earlier quoted context omitted.
I don't know what happens behind the scenes at Celsius. I do know there are many ways to get those high ROIs in DeFi. With zero evidence suggesting they are lying about returns, the charitable guess I can make is that they are getting high DeFi returns and giving their customers slightly lower ones after taking a cut.
Can you explain some of the ways then? Not the user facing side, but the backend/underlying part that generates the returns necessary to sustain those yields.
Specific vaults strats: https://medium.com/yearn-state-of-the-vaults/the-vaults-at-y...
Links to the actual contracts: https://yearn.watch/