I am going to clear some incorrect opnions about the voting system of Steemit. For example:
I have spent 2 weeks reading and using (Steem-Python)[steem.readthedocs.io]. For anyone who doesn't know about Steem Python, this is the official API for programmers and developers to develop Steem system.
If you vote from minute 0 to minute 30, your curation reward will be penalized. For example, if you vote from minute 25 and the curation reward for you is 1 SBD. What you would get is: 1 * 25 / 30 = 0.833 SBD.
If you vote from minute 30, you will get the full reward.
Therefore you should always vote from minute 30. After that, you will ALWAYS get the full reward no matter you vote from 2 hours or 5 days
Your curation reward depends ONLY on your VOTING POWER, your STEEM POWER and your VOTING TIME, and the voting percentage also (if you have more than 500 SP, you will be able to divide your vote)
Therefore no matter the post is 0.02 SBD or 100 SBD, your reward will always be the same after minute 30. You cannot expect to get more than that. Other reward of the post will go to the ones who have more SP power than you.
For example, I have 15 SP now and 100% voting power. The reward for my vote is only 0.001 SBD.
I will show you a clear example about the voting system on the next post.