Why not create an UIA which can be use as a fund for MM and dividends distribution from the profits of the bot/s.
This is a possible solution. I would prefer if the solution where trustless, but it may be necessary to pursue this course of action in the event that users cannot maintain a bot on their own.
Different levels of participation, I assume many people might be interested to participate and can trust known members to distribute and run the bots.
If we limit this to accounts that run on the dex, they can be easily audited by contributors. to ensure a fair ROI. Now if UIA had been already implemented the dividends distribution, bob is your uncle, as it will be 75% decentralised.
Move a step further and you can have different specialised bots, with different parameters, running on the DEX. Similar to eToro follower, but bot trading follower.