According to this article, the release invited users to join the platform to incentivize high-end projects that would serve the Kucoin ecosystem as well as the industry, adding that the proof of liquidity (PoL) on which Pool-X is built on will help boost liquidity through the record of the flow of funds with certificates used as liquidity bids.
https://mastersofnodes.com/kucoin-introduces-pool-x-next-generation-mining-pool-for-pos/