Increasing stETH liquidity with incentives

    To be widely adopted as high quality collateral, stETH needs to be highly liquid. Primarily, this means that converting between stETH and ETH, and between stETH and other major cryptos occurs with minimal slippage. Which projects are increasing liquidity for stETH, and by how much? Moreover, what is the USD value of the incentives issued by Lido and other protocols to increase stETH liquidity, and how cost-effective are they?