Olympus earns revenue as treasury yield from five sources: interest on the Cooler loans receivable (0.5000% APY by policy), staking yield on sUSDS and sUSDe reserves, trading fees on protocol-owned liquidity, and interest on convertible deposit loans.
Net income is returned through OHM repurchases rather than dividends — three programmes that retire what they buy, plus discretionary treasury purchases that are held. Both are capital returned; only the first reduces supply.