I have a question, what happens to the Hive that is not paid out if the rate is lowered.
What do you mean by that? HIVE is minted separately and it has its own dynamics of "printing"... HBD inflation comes on top of it... When people convert HBD to HIVE they print additional HIVE tokens, on top of the "reward pool"...
The problem becomes a problem when HIVE drops under a certain value and can't support HBD debt (sounds familiar from our dear banks... 🙂)... We can raise the debt limit (sounds familiar again) 😃
HBD will not be printed as author rewards, but some other things like DHF will still "print" HBD...
Thanks for the comment!