I never heard of it before, according to them the goal is:
CoinPool allows many users to share a UTXO and make
instant off-chain transfers inside the UTXO while allowing
withdrawals at any time without permission from other users.
My idea is basically the first part of this where many users share a UTXO, the off chain transfer idea is good but was not part of my plan. I am curious to see if this is DOA or still being developed.
So aggregated UTXOs that do not require lots of interactivity.