RE: The SBD:STEEM debt and payouts
Looks like you got the 2%- 5% figure already. I have an old post that chases this code, and the short answer is that it will print again when the market cap condition is reversed. In other words, it's purely a function of SBD supply to steem marketcap, as determined by the witness price feed.
I put that last bit on italics because the witnesses can adjust a bias to allow SBD to continue printing if they so chose.
Here's my latest quick post about the matter with a link to my older post that has the walkthrough: