This is the nature of humans. They saw you made 15.000 $ on a post, and you where only introduceing yourself. Most of them have no idea why. They dont understand that you made this money becouse you can help promoting STEEMIT in manny ways. They dont understand that you made this money becouse STEEIMIT users appreciates you for your work. I recomand you to ignore them. If you made that money it means you are appreciated for what you do and for who you are. And remeber guys, you must have braind to make easy money. Not everyone can do this.