A post is trending if a lot of real people vote on it.
But great that you informed yourself!
btw.: This is not a place to make money; it's a decentralized social media experiment where you can make some cents (depending on the value of steem).
Many people come here with all their usual habits from a greedy capitalist world; this is one of the biggest problems for steem.
steem's value is based on content (proof of content); steems value suffers from content being pushed beyond it's actual value.
I am not against using bidbots, it's a way to build a reputation. But then there is a red line where you buy reputation.
The 21 steem average is a miscalculation. It's not about everyone getting the same, but everyone getting rewarded according to the content they produce.
I have to say again: I'm happy I could inspire you to read up!
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Just don't rush it; building a solid audience takes rather time than money ;)