a few thoughts...
there is an over emphasis on investing on an author. That is because rewards after 5 days can be reused again and again cashflow-wise, while author rewards take much longer to return.
investing/losing 50% of each vote amount has an interesting effect on the ongoing wisdom value of your votes. (remember to round down)
i mentioned elsewhere, I thought that every article or post should require your own wisdom-vote to accompany it using the same 50% amount.
And that other than this invisible vote, wisdom cannot be voted on yourself. But nevermind not voting on yourself, that may give an advantage to those with 2 accounts.
called sharing wisdom.