Such a great article about how bid vote works. You efficiently explained everything. I really like the way the example of calculation you had given. At first when I joined steemit and start to use bid bots it's really complicated to me 2-3 times I lost money. After some calculations and some research I found we can made 10% to 15% profit if we use bots wisely. I don't recommend to use big bid bots for small account holders because there is 90% chance of loss. I highly recommend use of smartmarket designed and maintained by steem witness @thereawolf for guaranteed 10% ROI.