Sort:  

But i saw most of the higher reputation user using bot. Normal user can't do that.

Help me out here because I don't understand what you are saying. What do you mean by normal users? Who do you call normal users? And the others why aren't they normal? Besides, anyone can use bots.

Well, i disagree. Below 50 reputation, they are useless.

That doesn't mean you can't use then. Besides, you have to do more than post a photo or run a contest. It's a good start but it's far from being enough. You have to let people know you exist, you have to engage. You can do that by meaningful comments.

Already i have 100 friends. I have my own community. I want to use them later.

If you're not satisfied with your results it means that's not enough. Don't get me wrong, I just want you to understand how those, who didn't use bots, got their results.