I earn more money on Steemit than I have anywhere else in my life before. But I have worked hard to accomplish this. You cannot assume to make a lot of money here with just three posts. It is as if you create a new Facebook account with no friends and then you hope for likes. It doesn't work like that.
You should realize that each Dollar you make today will most likely be worth ten times as much in a year from now. Steemit is growing faster than Reddit or Twitter at that stage. And there is an enormous update coming soon with a multi-million Dollar marketing budget following it. Steemit has never done marketing before and is still in beta. The floodgates will open this year.