Few days back, I did a query for all hive account to find 'active' users. We can debate about what 'active' users mean, but I wanted to be generous, and used this criteria.

Accounts with author rewards > 500 HP
Accounts with comments > 10
Accounts which made those comments/or posts in last 6 months

I covered the results on this post. The query returned 4349 accounts which I plotted. I think this could be about 50% of hive accounts that 'matters' somewhat.

I would say 10 comments is a very generous bar (its curious that you also used 10). Using your analysis we get:

1112/13614 -> 8%; or 92% of the new accounts are essentially ZIP!

Why in our right mind we want to support such a project! This is in fact far worse that I thought. Reality often is that way!