Maybe you should just redo it already and lock this one, so that you can get the real results of your survey. Right now almost everybody is placing their vote on to $1,000 and up. It would better reflect the true state of the people in the forum. It's nice to have this kind of study, this would be useful for those people that create services for the community.
You are right, this poll should be redone. And maybe next time should be done with lower interval like 500$. In our country 500$ is way more than the minimum wage but considering 1st world country have higher wages, it is a good interval to balance 3rd and 1st world country income. Maybe on the next poll we will have a better and precise results.
I am also earning below 1000$. But to be more precise it is just a bit above 500$. And that is already coming from multiple source of income.You need to be in a managerial level and above to be able to earn more than 1000$ in our country.