Every time you upvote your voting power decreases. Your upvote worth is proportional to your voting power.
If your voting power is low your upvote worth is also low, same as if your voting power is high you will get high upvote worth.
If your voting power is at 100% you will get the highest upvote worth your account have.
Voting power is automatically regenerating as time pass by. Manage your voting habit so that your every upvote will not go to waste.
Go to steemnow.com then type your username wait for it to load then you will see your current voting power and the time it needs to become 100% again.
Some users said that you have to use 50% voting every day.
