robosats is a laregly trustless market for people who want to buy and sell bitcoin or lightning swaps. They are transitioning to a decentralized model that allows you to participate as a coordinator that facilitates matching makers with takers. The incentive is that you can extract a fee as a small percentage of the trade, and you only need a relatively small amount of liquidity to facilitate lightning transactions (but a larger amount of liquidity for onchain payouts).