OK I’ll try to clarify. @jmiller’s main concern with providing a liquidity pool is that the pool operator needs to handle other people’s funds. @benjyz also mentioned several good reasons somewhere why we don’t want an exchange to be a custodian because they have trading advantages.
So the idea was to make each liquidity operation a decentralized organization. You can buy and sell shares of the organization and get dividends for holding them. Every BTC obtained from selling shares will be used to support NBT liquidity and in exchange the buyer of the share gets a part of the fees in form of dividends.
Shares are sold by the organization at a fixed price defined at the start of the operation and also bought back by the organization at a price of L/S where L is the current sum of Tier 1 and Tier 2 liquidity and S in the share supply (so if the custodian makes revenues or losses through the operation, then those will be given back to the shareholders).
This way the bot operator legally doesn’t use other people’s money, just like a developer of a premined litecoin clone really owned the money after dumping the premine. The only remaining problem is that shareholders have to trust the bot operator to behave as promised.
That’s the point where I saw a trusted exchange as a possible solution, who is in control of the share market (but NOT the NBT liquidity markets) and who can avoid that the bot operator wipes out the account wallet.