"the idea is good enough to not give up on it just yet"

I agree, which is why I'd like to see'em either abandon
the idea of PoB or move towards a better solution. This,
so we can at least work it on the scale of content sorting.

Steem has an amazing ability to draw creativity out of
people. It can still do that, but even better if/when we
can be honest enough to let go of the failed concepts.
Thx for the curate @tobetada, and more importantly
for sharing your thoughts on the proof of brain topic.