Q: Why some of my post earn a lot of money but others not?
A: You earn money every time someone Upvote your post. the amount you earn each vote depend on that person Steem Power.
for example: a new steemit user upvote only worth around 1-3 cents mean while, a steemit users with lots of Steem Power in their balance can reward you $10 per upvote. This is why even if you have 2 post with the same number of votes, one can make $0.5 while other can make $50.
Q: Why do the earnings for my post go down?
A: this usually because you received downvotes and/or price of STEEM goes down.
Another reason is because if someone upvote you and also upvote lots of other posts within 30 minutes, the value of his/her vote will go down result your earning will also go down.
Q: Why i do not received 100% payout after 7 days?
A: You (content creator) only received 75% of the total payout. These other 25% will go to curators (people upvote and comments your post)
Q: How do I send money(STEEM) to another user?
Step 1: From your wallet page, click the STEEM or Steem Dollar balances with the down arrow next to them.
In the drop-down menu, click 'Transfer'.
Step 2: Type the username of the account you want to send the STEEM or Steem Dollars to.
Enter a memo to go along with the transaction (think of this as a note and it's totally optional).
Step 3: Click Submit.
Step 4: Enter your password to confirm and you DONE :D
Q: Can i delete my post?
A: The blockchain will contain the record of your post therefore it's impossible to delete. You can only edit and update your post with blank content.