Here is something interesting:

The sbdpotato experiment is pushing the debt ratio down
But the burnpost (and any other STEEM burn that is happening) is pushing the debt ratio up

So, they are creating a state where the debt ratio will stay always at the same place that it is now (above 10%), therefore, the steem economic model can go back to the model it was supposed to be working.

You can read more about it here:

https://steempeak.com/sbdpotato/@phgnomo/how-sbd-peg-actually-works-or-how-the-sbdpotato-conversions-won-t-affect-sbd-price