so, even if those tokens burned(or held at @null) you still count that as already "an issued in the past" and do not re-issue what's been burned?

maybe an example would make it easy for us to understand what i mean.

ex)

1. Total SP at tipu is 100.
2. Thus, 100 TPUs were issued already and distributed.
3. 1 year later SP grew up to 110.
4. During the one year, 20 tokens were sent to @null.
5. You will still only issue 10 TPU more as SP grew by 10.

or will you issue 30 TPUs (10 + 20 that were sent to null) ?