Thank you for the analysis. I see in the comments that there may be a little bit of confusion on @dustsweeper, and what it does. There really is no "Fee" to use @dustsweeper. In fact you receive a benefit from @dustsweeper. You put in 1 steem, and they put in 1 steem into your piggy bank so to speak, so when dustsweeper comes around and upvotes two of the dust level votes you received you can sort of look at it as one self upvote, and a @dustsweeper upvote.

So the person that gave the vote gets a reward, you get the reward the person wanted to give you, and dustsweeper gets a reward for helping both of you. Half of all the dustsweeper votes you receive are from your steem invested, and the other half is from steem dustsweeper invested in you. No fees involved just a deposit to your dust bank, you get all the money back.

Steem price hopefully will go back up, I do miss being able to cast a lot of votes that count. In the meantime I will continue to try and earn and power up Steem to SP.