High deposit interest rates and low borrowing rates - How is this profitable?

If I can borrow DAI from Maker for a smaller fee than my earned interest on lending out DAI on Compound, then how is that profitable for anyone other than me? I either heard this example in one of the videos of the “Crypto for Beginners” course or it was in one of their reading assignments. Perhaps the fee for Maker still makes the loan worth doing for them but what would drive Compound’s high deposit rates? Not seeing yet how they can financially offer high deposit rates in comparison to traditional banks.