Thanks for your comment.
- This model is trying to answer the question in the title, so voting weight is not taken into account as it is irrelevant. But since you are interested, I'll do that in the next few days (if i have time).
- The witnesses in TOP 20 are either voting at least one (voting for himself counts) or setting a proxy, so they do know how to vote.
- The only thing I would revise for this model is to use Median instead of Average.