Thank you for your effort, but you're missing one thing:
When you only have 70% votepower an upvote will bring 0,7$
And 100% upvote will cost 1.4% not 2%. So I will be able to make 14 upvotes which will cost me again 20% so one day of spendable voting power :)
The less voting power you have, the less voting power each vote take. If I would have 20% of voting power, each 100% vote would take 0.2% (2%/ 10).
This last thing should be 10% vp -> 0.2% for full vote.
Oh damn right, brain is out of order xD