We can run through an example here: A user deposits $10,000 worth of ETH-AVAX JLP Tokens. They can earn 41% APR on this collateral. With a reasonable 200% collateral ratio, they take out $5000 as an interest-free loan, and deposit it into another protocol. Following this, let's assume they keep investing into ETH-AVAX Joe LP Pool. They now have another $5,000 in JLP that they can stake again into Yeti Finance. If they stop here and don't choose to keep borrowing, they have a total APR of 41% base + 20.5% effective APR on the base asset. In total they get 61.5% APR, in addition to potential YETI rewards mentioned above.