Even with leases, the lease holder is paying with debt up front and is on the hook to fulfill payments, otherwise they're legally liable and their credit suffers. A rideshare rev split (or affiliate model) doesn't ensure the driver will cover the cost of the car and the manufacturer is on the hook with the risk of a depreciating asset not making money. If you do tie this to credit: - i.e. the driver pays in debt and loses if they don't fulfill rideshare payments - then you're just creating a lease with more strings attached.

Banks, ostensibly. That's what banks do, buy credit risk.

Or Tesla might just take the risk themselves, they continue to be in a reasonable position to raise cash. That's not typical for them though, they've traditionally relied on banks for consumer financing.

This is speculation now, but I get the vibe from Elon that he is interested in a revenue share in the ridesharing world, but that he doesn't think Tesla should be own its own fleet. That puts them into a much more airy fairy financial model, and I think Elon likes the economics of selling cars. Tesla is already a hard enough sell on Wall Street as it is, without a big fleet of cars depreciating on the books.

Tesla has issues with cash and liabilities at the moment, and I highly doubt that any type of scheme like you're describing would be floated by them in the near future.