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why? becuase the bigger my vote is the more i get in return?

When you give a 100% vote, you take 2% from what is left of your mana.
2% of 95% is greater than 2% of 50%, yes?

OH! so when you have a lot of Mana, you adjust your voting eight to be less, then when your mana is low, you weigh your vote higher ...?

IF you give higher weight votes when your vote mana is low, you will never get your mana back up.
I try to adjust my voting weight to make it through a day of curation and not drop below 85%.
Then, when I come back tomorrow, my mana has recovered to near 100%.