Better to build a frontend for Hyperliquid or Polymarket? The answer depends on builder monetization mechanics, which differ fundamentally. Hyperliquid implements explicit maker/taker fees that settle on-chain per fill, enabling referral or builder codes to receive a deterministic percentage of real protocol fees proportional to routed volume. With HIP-4, Hyperliquid also enables prediction markets directly on HL, meaning builders can target the same use cases as Polymarket while retaining protocol-level fee participation. Polymarket, by contrast, operates with 0% trading fees by design. Builder integration is limited to order attribution via auth headers, and “fee share” refers to off-chain, program-level rewards (grants, leaderboards, discretionary allocations), not per-trade revenue. Result: Hyperliquid exposes protocol-level, composable cash flows that can scale and compound for builders. Polymarket optimizes for liquidity and information quality, not predictable builder revenue.