The Uniswap Foundation, to encourage adoption of hooked pools, offers daily router rebates covering up to 80% of gas fees per swap, capped at 50 gwei, during liquidity incentive campaigns

Quotes that support claims

To further encourage ecosystem adoption, the program includes router rebates for flow through hooked pools. Routers can claim daily subsidies covering up to 80% of gas fees per swap, capped at 50 gwei per transaction